How to know baby is hungry ?

A. Hello good evening !! Baby tummy looks flat and cries while Hungry,keep hands in mouth. Exclusive breast milk or formula milk is suggested for babies until 5 completed months. Feed every two hours and whenever baby demands of breast feed 15-20 minutes feed if you have normal flow if less flow feed 30 minutes. Formula feed quantity depends on baby present weight Paediatrician will suggest you approximately 40-50 ml per feed.