Check out this terrific visual graphic showing the size of a newborn’s stomach at birth, three days, one week and one month old! Seriously, this so wonderfully represents how tiny a newborn’s tummy really is, especially at birth. They do not need much breast milk to feel full…for about 45 minutes…and then it digests and they may want to eat again. In any case, don’t stress new moms! The majority of breastfeeding moms have plenty of milk to give their newborns. You can read more about breastfeeding tips and view the original source for this photo here.