Fetal Development By Month by Nicole Maloney

Conception

maloneyn — 2022-11-04 21:35:38 UTC

Where it all begins.

Month 9 - Miles and Sarah

201800310 — 2026-04-28 16:26:31 UTC

Sources: https://www.pampers.com/en-us/pregnancy/pregnancy-calendar/9-months-pregnant

https://www.plannedparenthood.org/learn/pregnancy/pregnancy-month-by-month/what-happens-ninth-month-pregnancy#:~:text=When%20you're%209%20months%20pregnant%2C%20your%20fetus's,developed%2C%20and%20it%20has%20more%20body%20fat.

Average size 7.5 lbs. Fetus's lungs, brain, skin and hair are growing. Skin loses its fine hair. Babies drop down lower in the mother's stomach. At the end of month 9, the baby is born.

Month 3

201901586 — 2026-04-28 16:27:09 UTC

The baby is the size of a lemon and is about 2.5- 4 inches long. Facial features, organs, limbs and bones have developed. The baby moves frequently but the mother can not feel it yet.

SOURCES

https://kidshealth.org/en/parents/pregnancy.html#:~:text=The%20greater%20volume%20brings%20more,after%20the%20baby%20is%20born. https://www.plannedparenthood.org/learn/pregnancy/pregnancy-month-by-month/what-happens-third-month-pregnancy

Month 4 (Olivia, Kelsey, Sienna)

2017004581 — 2026-04-28 16:29:29 UTC

The baby is around 5-6 inches at this time. It is the size of an avocado. Hair is beginning to develop, the gender of the baby, and the roof of their mouth. For a female, the ovaries begin to move down from the abdomen to the pelvic area. A male's prostate gland begins to develop. For the mother, nausea lessens, heartburn and constipation become troublesome.

https://www.plannedparenthood.org/learn/pregnancy/pregnancy-month-by-month/what-happens-fourth-month-pregnancy

Month 1 (charlotte and bella)

201600449 — 2026-04-28 16:31:09 UTC

The baby is 1/4 of an inch long. The brain and spinal cord begin to develop. Some essential organs also start to form.https://www.plannedparenthood.org/learn/pregnancy/pregnancy-month-by-month

Month 2

2021047241 — 2026-04-28 16:32:12 UTC

Baby is 1/4 to 1/2 inch long
Buds for arms and legs develop
The neural tube begins forming
The umbilical cord begins developing.
The heart forms.
Webbed fingers and toes develop.
External ears, eyes, eyelids, liver, and upper lip begin forming.
Symtoms:
feeling very tired
peeing more often
heartburn
nausea
vomiting usually gets worse
Source: https://www.plannedparenthood.org/learn/pregnancy/pregnancy-month-by-month/what-happens-second-month-pregnancy

MONTH 7 - Hayley & Aleka

201329382 — 2026-04-28 16:33:33 UTC

The baby grows to 14-16 inches, which is about the size of a honeydew melon! The baby has rapid brain development and starts to open its eyes to the light. The baby gains significant fat usually weighing 2-4 pounds. The mother at this time usually feels backaches, shortness of breath, heart palpitations, constipation, and frequent urination. The fetus start to produce melanin and fat!

https://www.athensobgyn.com/blog/how-big-is-my-baby#

https://www.webmd.com/baby/pregnancy-your-babys-growth-development-months-7-to-9

https://my.clevelandclinic.org/health/articles/7247-fetal-development-stages-of-growth

Month 5 ( Isabella, Alexa, and Cam )

202309016 — 2026-04-28 16:33:53 UTC

The baby grows from being about 5 inches long and weighing about 5 ounces, to being about 10 inches long and weighing about 1 pound around this month.

During week 17 the skin is still thin but the fat is starting to be develop.

Week 18, The fetus is covered in lanugo, a peach fuzz-like hair. It helps keep the fetus warm and provides another layer of protection

Week 19, The fetus is getting stronger and most people begin to feel kicks and punches.

Week 20, The fetus’s nails grow towards the end of its fingers. The area of the brain responsible for its five senses begins to develop.

Also, the parents even might be able to get to find out the fetus’s assigned sex.

Month 6

2026-04-28 16:35:24 UTC

Lilly, Maya and Harper

SIZE:

the baby will grow from the size of a papaya to a cauliflower
almost 12 inches long
over 1 pound

WHAT IS DEVELOPING:

fetus is going through a growth spurt
babys lungs are formed but still developing
the brain is gaining weight
fat reserves are growing
finger and toe prints are developing
has organs and internal systems

WHAT ELSE IS HAPPENING:

the eyes move but eye lids are closed
baby responds to loud noises and sounds
the baby will kick and jab (still have room in the womb)
https://www.pampers.com/en-us/pregnancy/pregnancy-calendar/6-months-pregnant

8 months sophia cerise laura

2026-04-28 16:37:18 UTC

Weighs about 4-6 pounds but rapidly gaining fat and maturing. Measures 16-20 inches. Kicks start to be strong and visible