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A padlet by a colleague of mine with  created just in case you or someone else needs to know the science and all the rest of it. A selection of serious and not so serious bits of information and videos

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A padlet by a colleague of mine with a range of articles on breastfeeding related topics

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The Physiological basis of breastfeeding

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The Physiological basis of breastfeeding

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What's in milk and how is it made?

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The physiological basis of breastfeeding - Infant and Young Child Feeding - NCBI Bookshelf

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Breast milk contains all the nutrients that an infant needs in the first 6 months of life, including fat, carbohydrates, proteins, vitamins, minerals and water (1,2,3,4). It is easily digested and efficiently used. Breast milk also contains bioactive factors that augment the infant’s immature immune…

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Back to my breastfeeding Information Homepage

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This reassuring article goes through what is - and isn't a sign of supply issues.

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Forgive me for asking but...

Do you REALLY have low milk supply?

This is a very important place to start. Please bear with me. I don't mean to doubt your situation and be annoying patronising lactation consultant woman but it's crucial to note that the MAJORITY of new mothers who fear they have low milk supply DO NOT.

The majority of women who start to use formula because they worry they aren't making enough or baby isn't getting enough DO NOT HAVE A PROBLEM.

I cannot emphasise this enough.

Every day mothers panic and end breastfeeding or start using formula and there is not an underlying problem with their milk supply. But of course - once they start using formula without correct support, they often will start to send signals to their breasts to really reduce supply.

· You do not have low milk supply just because your baby won't go the X number of hours between feeds that the book on your coffee table tells you they should. Or your mother-in-law. Or the X number of hours your friend's baby is going between feeds.

A normal happy healthy baby who has a gorgeous mummy with a normal healthy milk supply might get hungry an hour after the last feed, or 90 minutes, or 45 minutes or two hours. They might be cluster feeding and hardly want to come off the breast at all. They might be having a growth spurt and feed every hour for a day.

· You do not have low milk supply because your breasts have stopped leaking. Some mothers leak less than others. MOST mothers notice that leaking reduces at the weeks go by and the teeny tiny sphincter muscles responsible tighten.

· You do not have low milk supply because your breasts feel softer than they used to. The excessive fullness we experience in the early days of breastfeeding is about vascular engorgement (blood and lymph) and it's about the body inefficiently storing unnecessary amounts of milk between feeds. As time goes by, the breasts get cleverer at storage (don't forget milk is also made while a baby is actually feeding). There is also less blood and lymph needed in the breasts as breast tissue growth slows down. At the beginning, it's often very obvious which breast is going to be fed from next. That feeling goes. And many mothers mistakenly connect it with a reduction in milk supply. We are not all supposed to continue feeling heavy and full throughout our breastfeeding experience. Don't ever think 'I'll wait to let my breasts fill up!' Noooooo. This shows a misunderstanding of how lactation works to a spectacular degree. When breasts are fuller, milk production slows down. When breasts are emptier, milk production increases. Emptier softer breasts may well be making a heap more milk in a 24 hour period than the engorged full versions.

· You do not have low milk supply because your baby feeds for a short time. Plenty of babies get everything they need in under ten minutes. Probably not five - but sometimes a feed might even be five minutes long. Lots of babies use their tongue and jaw muscles super efficiently and gulp and glug and slow down as the milk gets fattier and thicker and then come off happy. It might take them nine minutes or nineteen. A baby might start off life needing 30 minutes to drain a breast (when we say 'drain', breasts are never completely empty, it just means the baby has taken out all the milk they usefully want to). As a baby gets older, this can dramatically reduce. It doesn't mean less milk is going in. If a small sleepy jaundiced baby falls asleep very quickly at the breast without some solid minutes of good swallowing, that's a different story. Overall however, a longer feed does not always mean a better one.

· You do not have low milk supply because you have small breasts. Large breasts are a combination of fatty tissue and glandular tissue. You cannot tell much about someone's milk production by the size of the breasts. If you are really worried your breasts don't 'look right', we'll come back to this later.

· You do not have low milk supply just because your baby wakes up a lot. Plenty of young babies feed with similar intervals day and night. Plenty continue waking every 2-3 hours for a while.

· You do not have low milk supply because your baby won't 'go down' after a feed. So you feed your baby and they drop off to sleep on the breast. You move them to the Moses basket and they wake up as if you just placed them on a sheet of molten lead. And they seem to be rooting again. This happens because being next to you skin-to-skin was nice and cosy and relaxing and warm and it smelt good. The Moses basket is cold and NOT YOU. You probably triggered the Moro startle reflex when you moved them. You probably moved them about 15-30 minutes after a feed when the hormone cholecystokinin had dropped in their blood stream causing them to be more wakeful. Your teeny primate mammal baby finds the breast a lovely place to be. They like to suck to relax themselves. Babies like second helpings. This does not mean you are not making enough milk.

· You do not have low milk supply because your baby will take milk out of a bottle after a feed. Put a teat against a young baby's palate and you trigger that baby's sucking reflex. Babies will usually continue to take milk beyond the point that they need it. This is one of the reasons we see links between bottlefeeding and obesity.

You do not have low milk supply you cannot feel your 'letdown' reflex (milk ejection reflex). Some women feel an electrical tingle at the point the milk lets down. Some don't. Crucially some feel it for the first few weeks and then it fades. This fading sometimes worries people. It does not mean anything has changed with your milk supply and it is perfectly normal for the sensation to go.

· You do not have low milk supply because you don't pump very much milk. Pumping and breastfeeding are surprisingly unrelated. Your baby removes milk in a completely different way. Plenty of women with healthy milk supplies fail to pump much at all. Their bodies can't be tricked into eliciting the milk ejection reflex (or 'letdown'). Plus pumps don't always work. Suction goes as valves get old.

These are the things that REALLY tell you a mother might have low milk supply:

· Weight gain problems. A newborn is born and then loses weight. They regain birth weight at around two weeks. They then put on about 150-200g a week after that. That slows down after around four months. If your newborn loses more than 10% of their body weight, we might pay attention but we'll also want to look at things like your birth. Did you have a drip in labour that filled you and your baby with fluid? Did your gorgeous newborn look a wee bit like the Stay Puft marshmallow man in their first photos? That fluid elevated the birth weight and as it comes out again in the first few days, we might see more of a weight drop. That doesn't necessarily mean feeding or supply is a problem. However we wouldn't want your baby to lose weight after about day five or lose weight a second time. It might take some babies three weeks to get back up to birth weight.

Have a look at the chart in your red book. Notice how we have birth weight line and then a space where the curvy lines don't go and they start again at week two. Just because your baby was born on the 75th percentile, that doesn't mean we would expect them to definitely re-start on the 75th after that two week gap. That's why the lines don't continue. That's why we have that space. We start again at two weeks. Your baby might be on the 50th then. They then ideally will roughly stick in the same vicinity. But babies wobble around a bit. They might dip below. They might get close to the 25th. And then they might bob back up again. We don't expect all babies to hug a line exactly. This chart is a guide. It's about averages. It's not about mathematical certainties.

· Nappies. In the early days (first four weeks), we look at poo and pee. After your milk has come in (around day two to five), we'd expect to see six wet nappies in 24 hours and three poos the size of a £2 coin or bigger. After week four, some babies' poo rate can slow right down. This doesn't mean anything is wrong. Some babies can skip several days between poos and this isn't anything to do with milk transfer or supply. However if someone tells you it's OK for a ten day old baby not to poo for a few days, don't believe them. We'd need to investigate that situation. Only later on do we relax.

Weight gain and nappies. That's it. Those are the only things that tell us about milk supply. You may hear people say that 'babies should be settled after a feed' but some babies get wind or need to poo or have reflux or wake up and want second helpings. Let's be careful about even saying that. Let's look at weight gain and nappies.

So let's now assume you do have low milk supply. How many of you are still with me? I'm sorry if you are. I'm sorry if your baby only put on 60g last week and 90g or less or nothing the week before that and they are slipping down the percentiles. I'm sorry because I know how scary that can feel. Nothing feels like it matters more. There are things we can do.

1. Find people.

Find people who know about breastfeeding. Someone who tells you just to use formula in this situation is not who you need. If that's all they can offer you, they don't know about breastfeeding and you need someone else. You need someone who understands how lactation works. These people may actually still tell you to use some formula in some situations (or donor breastmilk) but they will do so alongside telling you how to protect and develop your milk supply. You also need people close to you to look after you. If you are going to do all the other stuff on this list, you need to have people who love you who will cook your dinner and run you a bath sometimes. And text you just before the weigh-in clinic next week to say they are thinking of you.
2. Breastfeeding M.O.T.
Someone like a breastfeeding counsellor or IBCLC (lactation consultant) should check your latch. You might not be sore and your nipples might not be misshapen after a feed but something still might be going wrong. Your latch needs checking. Is baby's chin deep into the breast? Is baby's body close to yours? Is baby's ear/ shoulder/ hip in a line?

They shouldn't just check your latch but look at your breastfeeding management. Are you feeding enough? Maybe your baby doesn't show cues very strongly and someone told you to wait for them and you're sometimes going four hours between feeds? Maybe you need to feed more frequently?

They may also need to take a closer look at your baby. Is there a reason why baby may not be transferring milk effectively? Is this someone who can look at baby's tongue, jaw and palate? Are they familiar with the term 'tongue tie' and especially 'posterior tongue tie'? Would they know what to do if there was one? That might mean suggesting an exaggerated latch or different positions or it might mean referring you to a tongue tie specialist.

When are you changing sides? Too quickly? (and baby is missing the fatty milk). OR did someone tell you to stick on one side forever to get that 'hind milk' and the baby is on 45 minutes without doing a heck of a lot? Maybe you need to change sides at 20-30 minutes instead and get baby a greater volume of milk overall and fatty milk overall. Both of these habits can cause weight gain problems. Get someone to help you recognise what swallowing looks like so you'll know when to change sides and when good feeding has finished.

3. Google ' breast compressions'. You'll get to a video and handout from Dr Jack Newman. You can finish a feed with breast compressions and get an extra dose of fatty milk into baby.

4. You have 3 sides and 4 sides. This is ' switch nursing'. Try and go back to the first side. There will be milk there. The more breastfeeding you do, the more milk you will make. The second time you return to that breast, the milk will be fattier and richer and you'll send great signals to your body to make more.

5. Find time.

If you are going to build up your supply, get help. You can't devote time to switch nursing and skin-to-skin when you have to go to Tesco to buy milk and pick up another child from school. If this is 'Operation Milk supply', who can help you? You'll read people talking about a 'babymoon'. Go to bed, they say. Just you and the baby. Feed lots. If that sounds appealing, go for it. Personally my babymoon would involve the sofa and box sets and crisps. However there's no point in babymoooning until next Christmas if your latch and breastfeeding management are the issues. Get that checked first.

6. Using a pump.

Baby feeding effectively is first choice but pumps can be useful. You can pump on an emptier breast to send even more signals to your milk supply. But we're not going to take a baby off the breast do be able to pump.

You don't need to wash and sterilize a pump every time you use it. Pop it in a plastic bag and put it back into the fridge between pumping sessions. 10 minutes is ample. If you are pumping for 30 minutes and 'nothing is coming' out, you are not getting a letdown and you are not doing yourself any favours. Use hand expression before and after (google 'Marmet hand expression') and prepare the breasts with warm compresses and massage if you can. You can take an hour and do some 'cluster pumping' or 'power pumping'. Pretend to be a baby having a cluster feed. Pump for ten minutes. Break for five. Pump again and repeat.

Just check your pump is the best one available. If it's second hand or you have had it a while, it might need servicing or replacement parts. You also might want to consider hiring a hospital grade double electric pump from someone like www.ardobreastpumps.co.uk to give yourself the opportunity to pump both sides together as effectively as possible.

Pumping shouldn't hurt. Make sure your flanges are the right size - that means they are the right diameter for the size of your nipple. Don't think that cranking up the suction will automatically do better things. And don't think, "I don't want to pump because I will empty my breasts and baby will have less milk." Certainly they might be less appreciative if you pump just before a feed is due and you leave them with an emptier breast full of thicker fattier milk but pumping overall will increase milk supply and stimulate milk production. You are not 'taking their milk away'.

You might also be someone who always gets better results with just using hand expression so stick with that.

Of course, you might not want to pump at all and just focus on feeding baby more effectively and frequently.

7. Galactagogues.

Taking herbs and medication that increase milk supply. Not right for everyone but some women really feel they helped. You need to read about side effects and dosage on sites like kellymom.com. Fenugreek, blessed thistle and goat's rue are popular. Some doctors prescribe domperidone in certain situations. These are never a substitute for good breast emptying and a breastfeeding MOT.

8. The science part.

In a book, this bit would be under a little flap as we're only talking to a small group of people.

Did you have breast surgery?

Are your breasts very widely-spaced or asymmetrical, or very tubular with a bulging areola? Did they not really change much in pregnancy (or puberty)?

Do you have PCOS? Some women with PCOS (not all) have a reduced milk supply.

These are times when it's worth finding an IBCLC and getting technical.

Some doctors will do hormonal testing for you. There are medications that can help develop breast tissue especially in pregnancy.

What about your thyroid levels? This is something relevant for more people than you might realise. If you are trying everything and low milk supply continues to be a problem, ask your doctor to check your thyroid levels. There are sometimes medical reasons mothers have a low milk supply and doctors and lactation consultants may be able to help you. These are not the most common reasons why people have low milk supply by a long shot. Hence the need for the flap.

Most people who genuinely have low milk supply got themselves into a pickle with using artificial nipples or not breastfeeding enough or breastfeeding ineffectively. And it can almost always be reversed.

Also remember that just because you had low milk supply in your first breastfeeding experience, it doesn't mean a subsequent lactation will also be a struggle. The development of all that breast tissue first time round often helps.

Hold in your mind the fact that women can relactate after not breastfeeding at all for several weeks. We CAN send signals to increase supply again in the vast majority of cases. There are tons of us in real life and online who want to support you.

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Forgive me for asking but... Do you REALLY have low milk supply? This is a very important place to start. Please bear with me. I don't mean to doubt your situation and be annoying patronising lactation consultant woman but it's crucial to note that the MAJORITY of new mothers who fear they have low milk supply DO NOT.

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Clear info that cuts through the scare stories

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A little knowledge can be a dangerous thing. This has never been so true as in the ongoing debate about foremilk and hindmilk and their impact on breastfeeding. The misunderstandings around these concepts have caused anxiety, upset, and even led to breastfeeding problems and premature weaning.

The 2003 edition of The Breastfeeding Answer Book defines these terms this way:

"The milk the baby receives when he begins breastfeeding is called the 'foremilk,' which is high in volume but low in fat. As the feeding progresses, the fat content of the milk rises steadily as the volume decreases. The milk near the end of the feeding is low in volume but high in fat and is called the 'hindmilk'" (Mohrbacher and Stock, p. 34).

It goes on to explain that by simply letting the baby "finish the first breast first"-switching breasts when the baby comes off the breast on his own rather than after a set time-the mother can be sure her baby receives the "proper balance of fluid and fat." Since this book was published, research has expanded our understanding of foremilk and hindmilk and answered many of the common questions mothers have about these concepts.

What worries? Confusion about foremilk and hindmilk has led to all sorts of uncertainty. Are there two distinctly different types of milk? Does the baby need to breastfeed for a specific number of minutes before foremilk suddenly turns to hindmilk? Can a baby miss out on hindmilk altogether if he breastfeeds for too short a time? If this happens often, will his weight gain suffer? Sometimes healthcare providers get into the act, telling breastfeeding mothers they should watch the clock to make sure their baby breastfeeds "long enough to get the hindmilk," with the number of minutes recommended varying by adviserWhat do we really need to know about foremilk and hindmilk? And is there any reason to worry?

The truth about foremilk and hindmilk. Research has found this concept is not as simple as it sounds. It is true that fat sticks to the milk ducts in the breast and the percentage of fat in the milk increases during a breastfeeding as the fat is released from the ducts during milk ejections. But the reality of this seemingly simple dynamic is not always as it seems.

There are not "two kinds of milk."Despite this common belief, there is no "magic moment" when foremilk becomes hindmilk. As the baby breastfeeds, the increase in fat content is gradual, with the milk becoming fattier and fattier over time as the breast drains more fully.

The total milk consumed daily-not the hindmilk-determines baby's weight gain. Whether babies breastfeed often for shorter periods or go for hours between feedings and feed longer, the total daily fat consumption does not actually vary.

Foremilk is not always low-fat. The reason for this is that at the fat content of the foremilk varies greatly, depending on the daily breastfeeding pattern. If the baby breastfeeds again soon after the last feeding, the foremilk at that feeding may be higher in fat than the hindmilk consumed at other feedings.

How does this work? Interestingly, foremilk and hindmilk are concepts that really only make sense when longer intervals such as two to three hours or more occur between feedings. The longer the time gap between feedings and the fuller a mother's breasts become, the greater the difference in fat content between her foremilk and hindmilk. These differences in fat content can vary greatly over the course of a day even among individual mothers. For example, when a long breastfeeding gap occurs during the night, at the next feeding a mother's foremilk will be lower in fat than during the evening when her baby breastfeeds more often.

What really matters. Research indicates that there is no reason to worry about foremilk and hindmilk or to coax a baby to feed longer. As long as a baby is breastfeeding effectively and the mother does not cut feedings short, baby will receive about the same amount of milk fat over the course of a day no matter what the breastfeeding pattern (Kent, 2007). This is because the baby who breastfeeds more often consumes foremilk higher in fat than the baby who breastfeeds less often. So in the end it all evens out.

What's most important to a baby's weight gain and growth is the total volume of milk consumed every 24 hours. On average, babies consume about 750 mL of milk per day (Kent et al., 2006). As far as growth is concerned, it doesn't matter if a baby takes 30 mL every hour or 95 mL every three hours, as long as he receives enough milk overall (Mohrbacher, 2010). In fact, researchers have found that whether babies practice the frequent feedings of traditional cultures or the longer intervals common in the West, they take about the same amount of milk each day (Hartmann, 2007) and get about the same amount of milk fat. Let's simplify breastfeeding for the mothers we help and once and for all cross foremilk and hindmilk off our "worry lists."
References
Hartmann, P.E. (2007). Mammary gland: Past, present, and future. in eds. Hale, T.W. & Hartmann, P.E. Hale & Hartmann's Textbook of Human Lactation. Amarillo, TX: Hale Publishing, pp. 3-16.

Kent, J. C. (2007). How breastfeeding works. Journal of Midwifery & Women's Health, 52(6), 564-570.

Kent, J. C., Mitoulas, L. R., Cregan, M. D., Ramsay, D. T., Doherty, D. A., & Hartmann, P. E. (2006). Volume and frequency of breastfeedings and fat content of breast milk throughout the day. Pediatrics, 117(3), e387-395.

Mohrbacher, N. Breastfeeding Answers Made Simple: A Guide for Helping Mothers. Amarillo, TX: Hale Publishing, 2010.

Mohrbacher, N. and Stock, J. The Breastfeeding Answer Book, 3rd edition. Schaumburg, IL: La Leche League International, 2003.

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Worries About Foremilk and Hindmilk - Nancy Mohrbacher

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A little knowledge can be a dangerous thing. This has never been so true as in the ongoing debate about foremilk and hindmilk and their impact on breastfeeding. The misunderstandings around these concepts have caused anxiety, upset, and even led to breastfeeding problems and prem

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Over the course of her breastfeeding journey, it is almost inevitable that a mother will encounter the terms "foremilk" and "hindmilk". There is certainly no shortage of confusing and conflicting advice on the concept, which has led to a lot of misunderstanding.

In The Breastfeeding Answer Book, "foremilk" and "hindmilk" were defined as follows:

"Foremilk" is the milk the baby receives when he begins breastfeeding, which is high in volume but low in fat (1).

"Hindmilk" is the milk near the end of the feeding, which is low in volume but high in fat (1).

Actually, the terms "foremilk" and "hindmilk" only really refer to samples of breastmilk taken right at the beginning of a feed ("foremilk") and samples of breastmilk taken right at the end of a feed ("hindmilk"). Even then, the advantage of using these terms is debatable. A photo on

Why?

Wikipedia "helpfully" shows two 25ml samples of human breastmilk: "foremilk" on the left and "hindmilk" on the right:

The problem with showing a sample of breastmilk from the start of a feed together with a sample of breastmilk from the end of a feed is that it tells us nothing about what happens to the breastmilk in between the two samples. Mothers end up mistakenly believing that their breasts make two different types of milk, and wonder how long they must feed for before the "foremilk" magically switches over into "hindmilk" (2).

So if the terms "foremilk" and "hindmilk" are misleading and there's no "magic switch" from one to the other, what really happens?

Since The Breastfeeding Answer Book was published in 2003, research in human lactation has advanced (2), so we now understand more about how breastmilk is produced:

Your breasts make just ONE type of milk

There is no magic switch between two different types of milk over the course of a feed. In fact, The answer lies in what happens to the
there is no sharp distinction between breastmilk at the start of a feed and breastmilk at the end of a feed (3). "Milk does indeed change consistency during a feed - but this happens gradually rather than suddenly" (4).

Why does the consistency of breastmilk change over the course of a feed?

fat in breastmilk when breastmilk is

Your breasts are continuously making just one type of milk, containing 'sticky' fat globules that tend to stick to each other and to the milk ducts in the breast as breastmilk is produced (2,3,5).

Breastmilk produced between feeds moves down towards the nipple and collects in the breast, leaving increasing amounts of fat globules 'stuck' together further up the milk ducts (3).

When let-down occurs, the milk ducts dilate (5) and the milk is ejected from the breast. The milk removed at the beginning of a feed may be lower in fat because the fat globules are still 'stuck' further up in the milk ducts (6). As the feed progresses, multiple milk ejections occur (5) and the breast is emptied, more and more fat globules become dislodged and the breastmilk increases in fat (3,6). This has the overall effect of a gradual increase in fat content of breastmilk in each breast independently as milk is removed.

How do we know that the increase in fat is gradual?

Studies involving several mothers have been conducted in which samples of breastmilk were taken at intervals over the course of a feed. The evidence from these studies suggests that the fat content of breastmilk increases gradually as the breast becomes progressively emptier over the course of a feed (7,8).

It's much easier to explain this gradual increase in fat content using pictures...

...so, revealing the crazy lengths I'm prepared to go to so I can prove a point, I visited The Countess of Chester Hospital, where several wonderful people enabled me to take consecutive small samples of breastmilk from one breast only over the course of one pumping session, and professionally photograph the results. The samples were then taken to the Cheshire and North Wales Human Milk Bank, where the fat content of each sample was analysed.

This is the snapshot we got of the gradual increase in fat content of my milk over the course of one pumping session:

Note the gradual colour change of each breastmilk sample. This is the gradual increase in fat content from the beginning of a feed (test tube 1) to the end of a feed (test tube 12).

Remove test tubes 2-11, and the result is a picture similar to the one on Wikipedia:

This shows a sharp contrast between the breastmilk at the When breastmilk is left to stand for a while, it separates into two layers. This very beginning and the breastmilk at the very end of a feed only - it tells us nothing about what happens to the breastmilk in between the two samples. Only the photo containing all 12 test tubes shows the complete picture: a gradual increase in fat content.

isn't the separation of "foremilk" from "hindmilk"; it is simply the fat in the milk rising to the top, not the separation of two different kinds of milk (4).
So what's that stuff that rises to the top of expressed breastmilk?

The reason this separation doesn't occur in a bottle of cow's or goat's milk you buy in a shop is that this milk has been homogenised. "

Whole homogenised milk is identical in fat and nutrient content to whole standardised milk however it has undergone a process known as "homogenisation" which breaks up the fat globules in the milk. This spreads the fat evenly throughout the milk and prevents a creamy layer forming at the top." (9)

After a while, the breastmilk in our test tubes separated into two layers (click on the image to open a larger version in a new window):

Again, removing test tubes 2-11 shows
Note that the breastmilk in test tube 1 does, in fact, contain a layer of fat.

Note also the increasing thickness of the fatty layer that collects at the top of the breastmilk from test tubes 1-12. This further demonstrates a gradual increase in fat content from the beginning of a feed (test tube 1) to the end of a feed (test tube 12).

only a sharp contrast between the thin fatty layer that rises to the top of the breastmilk at the very beginning, and the much thicker fatty layer that rises to the top of the breastmilk at the very end of a feed.

This photo tells us Before I continue, I must stress that this is just a snapshot of
nothing about what happens to the breastmilk in between the two samples. Remember: only the photo containing all 12 test tubes shows the complete picture: a gradual increase in fat content.

Showing us pretty pictures is nice, but how much fat did the breastmilk samples actually contain?

my breastmilk. It is unlikely that the results shown here will be an exact reflection of what happens to every mother's breastmilk. However, it does provide a rough idea of what happens, so here are the results of the analysis of each sample of my breastmilk:

If looking at raw data isn't your thing, here's a line
TS = Total Solids, ie. the bulk of the rest of the milk
Protein, carbohydrate, fat and TS values are in grammes per 100ml

graph showing the amount of protein, fat, carbohydrates and total solids present in each of my 12 breastmilk samples (fat content is shown in red).

The graph clearly shows there was a gradual (if slightly wobbly) increase in fat content as the breast is emptied. Quite plainly, there is no arbitrary "magic switch" between two different types of breastmilk during a feed.

Remember, though, that all of this is just a tiny piece in a vast breastfeeding jigsaw...

Although it is true that the fat content does gradually increase as the breast is emptied, it is important to understand that the difference in fat content between milk at the beginning of a feed and milk at the end of a feed can vary greatly from mother to mother. Not only this, but it can vary greatly over a 24 hour period, even among individual mothers (2). The difference in fat content can also depend to some degree on the amount of time elapsed between each feed (this is truer the younger the baby is) - another reason why it might not be a good idea to wait for your breasts to "fill up" before a feed.

the higher the fat content of the milk

the lower the difference in fat content between the breastmilk at the beginning and end of a feed (2,3)

This is not simply a case of the longer the feed, the higher the fat content: if there is a shorter gap between feeds (such as during periods of cluster feeding), the milk at the beginning of a feed may not necessarily be low in fat (2,10).

"Babies can show a wide variety of feeding patterns, suckling for varying lengths of time and at varying intervals over the course of a day, and maintain a healthy weight" (4,10)

Whilst fat is important, we can and do get far to preoccupied with the issue of fat content - take another look at the graph showing the amount of protein, fat, carbohydrates and total solids present in each of my 12 breastmilk samples:
The most important thing to remember is this:
In the vast majority of cases, as long as you are:

breastfeeding on cue

and allowing your baby to come away from the breast spontaneously at the end of a feed,

there is no need to worry about what's in the breastmilk your baby is getting. ALL of the components of breastmilk are essential for the growth and the physical and mental development of your baby, not just its fat content.

_________________________________________________________

If you liked this article, please consider making a small donation to Cheshire and North Wales Human Milk Bank (a charity which does a fantastic job of getting breastmilk to our most vulnerable babies), without whom this article could not have existed.

Lynda Coulter (Cheshire and North Wales Human Milk Bank) for very kindly agreeing to analyse the samples of my breastmilk.

Janet Beech and Linda Gendler (Cestrian Ward, The Countess of Chester Hospital) for entertaining my mad idea and helping to co-ordinate the experiment.
Becca Williamson (Bosom Buddy breastfeeding peer supporter) for being my extra pair of hands.

Jenni Ross (Medical Photography, The Countess of Chester Hospital) for taking such excellent photos of my breastmilk samples. This article has been republished as a guest blog on
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Acorn Pack
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Foremilk and Hindmilk: In Quest of an Elusive Arbitrary Switch.

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Over the course of her breastfeeding journey, it is almost inevitable that a mother will encounter the terms "foremilk" and "hindmilk". There is certainly no shortage of confusing and conflicting advice on the concept, which has led to a lot of misunderstanding.

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What are your options for Sometimes babies need more milk than they can take, to be fed away from the breast.

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Babies sometimes need more milk than they can take at the breast. This may be because they were born early or small, and don't yet have enough energy to do all the work of breastfeeding. Sometimes, mothers don't have as much milk as their baby needs. It is important that babies get enough milk to be healthy and to grow normally.

La Leche League groups welcome anyone who is breastfeeding or providing their own milk for a baby, or trying to do so. Please don't feel awkward about needing to give your baby extra milk at an LLL meeting! We would love to meet you and your baby!

Get support from LLLGB here.

Why a baby might need extra milk
How to tell if your baby is getting enough milk
Normal growth
Why protecting the milk supply is urgent
Why a mother might not be able to make a full milk supply
Giving extra milk - what kind of milk
Mothers' feelings about using formula milk
Extra milk - how to give it
Extra milk - when to give it
Extra milk - how much to give
Reducing the amount of extra milk
What if you need to keep using formula milk?

Why a baby might need extra milk

The most common reason for a baby to need extra milk is a slow start with breastfeeding, when not enough milk was removed from the mother's breasts in the early days after birth. This can happen when a baby is early, small, unwell, very sleepy, or unable to breastfeed at first. It can also happen when a baby isn't taking a deep enough mouthful of breast tissue to breastfeed effectively. In this case, the mother may get sore, damaged nipples and the baby may seem unhappy and unsatisfied, never wanting to let go of the breast. When not enough milk is removed, the mother's milk supply doesn't get a strong enough signal to increase to the level the baby needs.

You can read more about this here: My baby needs more milk.

How to tell if your baby is getting enough milk

When young babies aren't getting as much milk as they need, the first sign is usually that they don't poo as much as expected. A baby over 3 days old who isn't doing at least 3 yellow poos - the size of a 2p coin or larger - every 24 hours needs to be checked by a healthcare provider. After about 6 weeks, babies find their own pooing pattern, which may be less often. As long as the baby is well and growing normally, it doesn't matter by this stage how often they poo.

Weight loss is another important way to tell whether a baby is getting enough milk. Babies usually lose up to 7% of their birth weight in the first 3-5 days after birth. If they lose more than this, or keep losing weight after day 5, they need to be checked by a healthcare provider.

You can read more about this here (is my baby getting enough milk?) and here (what's in a nappy?).

Normal growth

Babies usually get back to their birth weight by 10-14 days after birth. In the first 3-4 months of life, boys grow at an average of about 40g a day, and girls at an average of 34g a day. A baby who puts on less than 30g a day on average, or whose growth curve drops down across more than one "centile line" on their weight chart, needs to be checked by a healthcare provider.

Why protecting milk supply is urgent

Whatever the reason, when a baby isn't taking as much milk as she needs at the breast, the mother's milk supply may not increase enough to meet all the baby's needs. Milk supply usually increases quickly in the early days after birth, reaching its peak level by the end of the first month. Most of this increase happens in the first 2 weeks, so the amount of milk that is removed at this time is really important. If too little is removed, it may limit how much milk a mother can make later.

When breastfeeding is going well, a baby nursing at the breast will remove milk much more effectively than any breast pump. However, if your baby isn't breastfeeding at all yet, or isn't taking as much milk as he needs at the breast, it is important to start expressing your milk as soon as possible. This will ensure that your body gets the signal it needs to make more milk. Babies who are not breastfeeding effectively may want to spend a lot of time at the breast, so it can be difficult to find time to express milk. Given the importance of protecting your milk supply at this stage, it may be necessary to limit the baby's time at the breast to free up enough time to express. This is an investment of time to make sure you have enough milk later. Find good breastfeeding support as soon as possible.

You can read more about expressing and storing milk here.

Why a mother might not be able to make a full milk supply

Occasionally, a mother may have a medical history or health issues which limit the amount of milk she can make. These reasons can include:

A history of infertility due to hormonal imbalances

Past breast surgery, especially breast reduction

Breast hypoplasia/Insufficient Glandular Tissue (IGT) - breasts may be unusually small, unevenly-sized, long and thin, with a wide space between them and there may be no breast changes (such as increase in size and tenderness) during pregnancy

PCOS (polycystic ovary syndrome)

Thyroid problems (over- or under-active)

Obesity (BMI over 30)

If any of these apply to you, you may still be able to make milk normally. However, if your breastfed baby isn't growing well it is important to find good breastfeeding support quickly.

Giving extra milk - what kind of milk

The first choice when extra milk is needed is your own expressed milk, which is tailor-made for your baby. The second choice is donated milk from another mother. This may be available from a Milk Bank if your baby is still in hospital.

You can read LLL's policy on informal sharing of breastmilk here.

When none of these is available in the amounts needed, infant formula milk may be necessary. If you are not sure what kind of formula milk to use, check with your midwife or health visitor. You can find independent information about infant milks in the UK here.

Mothers' feelings about using formula milk

When you were looking forward to breastfeeding your baby, it can feel disappointing to realise that he needs formula milk as well. You might even wonder whether it is worth carrying on breastfeeding, or whether your baby will come to prefer formula milk. It can help to think of formula milk as a kind of medication, to give your baby the energy he needs to breastfeed well. Babies are "hard-wired" to breastfeed and even a small amount of breastmilk can have a significant positive effect on health outcomes that no formula can provide. Even if your milk supply is very low, you and your baby can still enjoy the cuddly, calming, comforting aspects of breastfeeding, for as long as you want to. Breastfeeding is about much more than just milk!

Extra milk - how to give it

There are several options for giving extra milk to a baby.

In the first 1-2 days after birth, when the baby needs small amounts, a teaspoon can work well. You could express your own milk directly into the spoon and use it to feed the milk to your baby. On day 1 after birth, a full feed is about 7ml (1 ½ teaspoons), on average. On day 2 after birth, this doubles to about 15ml (3 teaspoons) per feed. Newborns need at least 8-12 feeds in 24 hours.

By day 3, something larger is needed. Cup-feeding can work well, with practice. You can use any clean cup - a small one, such as a shot glass, can work well. Trying to feed your partner or support person with a cup of water and having them feed you in return can help you quickly learn how far to tip the cup so that your baby can sip from it.

A nursing supplementer (also known as a lactation aid) is a tool that lets you feed extra milk (either expressed milk or formula milk) while your baby breastfeeds. It can be useful if you want to breastfeed but don't have enough milk. The extra flow of milk can encourage your baby to breastfeed. You can read more about supplementers here.

If bottles are used, it is important to know how to use them in a way that supports breastfeeding. It is easy to feed a baby too much, too fast by bottle, and this can be unhelpful for a baby who is finding breastfeeding difficult. You can find out how to do "paced" bottle feeding - at a good speed for your baby, letting him choose how much to take - here.

Extra milk - when to give it

It is often suggested that you breastfeed first, before giving the extra milk. This often means that the baby is at the breast when he is hungry and least happy, which can make breastfeeding stressful for both of you.

An alternative might be to try ending feeds with your baby at the breast. This may mean starting with some extra milk, to calm your hungry baby enough to help him breastfeed. Or you could start with one breast, give the extra milk in the middle, and finish on the second breast. It's much nicer for your baby to fall asleep at your breast than with a cup or bottle!

Even if your baby isn't breastfeeding much or even at all yet, spending happy time being at or near your breast will make it easier for him to breastfeed when he is ready. Carrying your baby in a sling, cuddling him skin-to-skin, taking a bath together and lying down together in a prepared bed ( if it is safe for you and your baby to do so) are all good ways for him to spend relaxed time at the breast. Babies who feel comfortable at the breast are more likely to try breastfeeding when they are ready. You might like to give the extra milk with your baby's cheek resting on your breast, letting him fall asleep on the breast as he finishes.

Extra milk - how much to give

Healthy, full-term babies are usually very good at knowing how much milk they need. If you are giving extra milk by cup or bottle, carefully watch your baby for signs that he wants more or has had enough. Your baby can show you how much they want.

Sometimes, though, a baby is so early, unwell or sleepy that they are not able to ask for as much as they need. A baby who has been getting less milk than he needs for a while may act as if he is not hungry, because he doesn't have much energy. He may look as if he is finished after a very short feed, but he will not be pooing or growing as expected.

When this happens, it is important to encourage the baby to take more milk. Keep your baby close, doing skin-to-skin as much as you can. This will encourage your baby's interest in feeding, and help you to notice the first signs that he is waking up and getting ready to feed. Your baby may only be able to feed for a short time, so he needs to do it very often. Feeds don't have to be equally spaced, but they need to happen at least 8-12 times in 24 hours. It can be helpful to record the number of feeds, along with the number of wet and dirty nappies he has done each day.

When your baby is growing and pooing as expected, he is taking as much milk as he needs.

It is important to keep in close touch with your healthcare provider during this time. If your baby starts doing fewer wet nappies, or it is getting more difficult to wake him to feed, please contact your midwife or doctor straight away.

Once your baby starts to take more milk, his energy will increase. He will start to catch up with his growth, and he might want a lot more milk. Don't panic! Give him as much as he wants, making sure that you feed carefully if using a cup or bottle, so that he can stop when he has had enough. Once his growth has caught up with where it needs to be, his appetite will calm down.

Reducing the amount of extra milk

If your goal is to feed your baby only with your milk, you will be wondering how to reduce the amount of donor or formula milk your baby is getting. It is important to work with your healthcare provider and your local breastfeeding supporters to come up with a plan tailor-made for you and your baby.

Read our article on Weaning from Supplements here.

What if you need to keep using formula milk?

Sometimes, however hard you try to increase your milk, your baby might need to keep having some formula milk. This might be an important part of his diet, or even most of it, but remember that breastfeeding is about much more than just milk. If you ask mothers of older breastfeeding babies or toddlers what they and their babies value about breastfeeding, they usually forget to mention milk! They talk about how much their babies enjoy it, how useful it is for calming them down and getting them to sleep, and how restful it can be for the mother to sit or lie down to feed. Breastfeeding can still work really well in all these ways, whether or not the baby is also having some formula milk.

It is sometimes possible to stop using formula milk after the baby has started eating other foods, usually from around 6 months. As your baby eats more food, he will need less milk. It is often possible to reduce the amount of formula he takes while still breastfeeding as much as you like. After a year, babies can drink unmodified animal milk (such as cow's milk or goat's milk) and no longer need formula milk. You can continue to breastfeed for as long as you and your child want to. Many mothers who have needed to use formula milk in the early months of their child's life find that the later months and years of breastfeeding are much more enjoyable, because they no longer need to think about how much milk their child is getting.
Written by Jayne Joyce, LLL Oxfordshire, June 2018

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Using donor milk and formula to support breastfeeding - La Leche League GB

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Babies sometimes need more milk than they can take at the breast. This may be because they were born early or small, and don't yet have enough energy to do all the work of breastfeeding. Sometimes, mothers don't have as much milk as their baby needs.

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What's in Breastmilk? What's in Formula?

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What's in Breastmilk? What's in Formula?

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Here's a list of common contents.