In the first week, babies will take considerably less than 150g per kilo of body weight 

On Day 1, a baby can’t take much more than 5-7ml per feed. Usually newborns will feed 8 to 12 times or more in 24 hours, although on Day 1 a baby might have quite a long sleep after an initial period of alertness immediately after birth.

By Day 2 the baby’s maximum stomach capacity is circa 10ml per feed.

By Day 3, the baby’s stomach has grown enough to take around 22-27 ml per feed

The baby's stomach capacity increases by 10ml per day until it plateaus by Day 7, when babies  take around 45-70ml per feed.

The volumes babies take will often vary from feed to feed. The crucial thing about these voumes is that they reflect the baby’s maximum stomach capacity and your baby might sometimes want less than this per feed. And of course, the volumes also depend on how frequently your baby is feeding. UNICEF talk of an average of 10 to 12 feeds in 24 hours, and recommend no fewer than 8 feeds.