How big is a 1 week old stomach?
Approved answer
Stomach Size of a Newborn
On Day 1 (24 hours old), the stomach can hold about 1 tablespoon. By Day 3 (72 hours old), it increases to approximately up to 1 oz. Between Day 8 and Day 10 (less than 2 weeks old), it typically ranges from 1.5 to 2 oz. And for infants aged 1 week to 1 month, the stomach capacity generally expands to 2 to 4 oz.