Hi. My baby is 5 months old.usually she  takes  750ml per day.but last two weeks she has been taking around 600 ml only. Also she would vomit a little from15 minutes to 1 hour duration after feed.is it a correct quantity of formula for 5 months old baby?
Let me emphasize on the fact that breast milk is the best food for a baby. Most formula milks are cow milk based and hence hard to digest for a child of this age. Hence, a child may not tolerate such formula milk, and it is not unusual for a baby to vomit out such milk. It could also be due to gastroesophageal reflux which may occur due to not burping the child properly. Holding the child in upright position for around 20 mins after all feeds may help in resolving the issue. The quantity varies from child to child, but 750 ml is supposed to be a decent amount. Generally it should not be more than 900 ml per day. Rather than trying to increase the amount of formula, I would rather suggest an early weaning with semi solids since the child is already 5 months old. It will help in ensuring proper nutrition for the baby.