Monthly baby just born within 12 hours of discharge green or dark green fetal stool, 3 ~ 4 days after the change to yellow or yellow-green feces, followed by breastfeeding discharged yellow dilute paste-like feces, mixed feeding discharged soil yellow soft stool. Newborn babies, in the fetal period swallowed amniotic fluid, fetal shed epithelial cells, mixed with bile, intestinal secretions, after birth discharged feces appear dark green-like, usually 6 ~ 12 hours after birth discharge, preterm babies may be discharged later. After 3~4 days, it turns into yellow or yellow-green feces. Next, breastfed babies pass golden yellow, thin, pasty stools or curd-like stools. Mixed-feeding babies pass earthy yellow soft stools, which are sometimes dry and hard. In addition, the above stools are normal in nature and color. In clinical practice, babies should be observed after birth and seek medical advice if there are any abnormalities.