Infant Stomach Size (Term Newborn)

Day 1: 5-7 ml (1 teaspoon).
This is the size of a large marble or cherry.
Mother will produce about 30 ml (1 oz) of early milk/colostrum in the first 24 hours.
The size of the newborn’s stomach is influenced by birth weight however the differences are small.

Day 3: 22-27 ml (4-5 teaspoons).
It is about the size of a ping pong ball or a walnut.

End of Week 1: 45-60 ml (1 ½-2 oz)
It is the size of an apricot.
With frequent feedings maternal milk production increases to about 280 -576 ml (9-20 oz) per day by Day 7.

Weeks 2 & 3: 60–90 ml (2-3 oz) with feeding.
With frequent feedings maternal milk supply continues to build.
Infants can take in 590-750 ml (20-25 oz) per day by the end of the third week.

One month: 80-150 ml (3-5 oz) with feeding.
The baby’s stomach is now about the size of a large chicken egg.
The daily milk intake will be in the range of 750 – 1035 ml (20-35 oz) per day.

Day 1 .......................	5-7mL (1 teaspoon)	This is the size of a large marble or cherry. Mother will produce about 30 ml (1 oz) of early milk/colostrum in the first 24 hours. The size of the newborn’s stomach is influenced by birth weight however the differences are small.
Day 3	22-27 ml (4-5 teaspoons).	It is about the size of a ping pong ball or a walnut.
Day 7 (End of 1st wk)	45-60 ml (1½ - 2 oz)	It is the size of an apricot. With frequent feedings maternal milk production increases to about 280 -576 ml (9-20 oz) per day by Day 7.
Days 14-21 (Weeks 2 & 3)	60–90 ml (2-3 oz) with feeding.	With frequent feedings maternal milk supply continues to build. Infants can take in 590-750 ml (20-25 oz) per day by the end of the third week.
Day 30 One month	80-150 ml (3-5 oz) with feeding	The baby’s stomach is now about the size of a large chicken egg. The daily milk intake will be in the range of 750 – 1035 ml (20-35 oz) per day.