When a baby comes into the world, parents are happy, but at the same time, they are a bit overwhelmed by the food, drink and sleep of the baby, plus the special physiological manifestations of the newborn baby including stool, which makes new mothers and fathers at a loss. Newborn babies excrete meconium, which is black-green and sticky, and includes amniotic fluid, mucus, fetal hair, bile, and cells shed from the skin and digestive tract. Newborn meconium is usually excreted within 3-4 days after birth, after which it turns to normal yellow feces. If the baby is breastfed, the stool is golden yellow and thin; if the baby is fed exclusively with formula, the stool is light yellow and often dry; if the baby is mixed, the stool is somewhere in between. Special formula-fed babies, such as those fed with amino acid formula, have dark green stools. The number of stools per day is variable for newborns, generally 2-5 times, breastfed newborns have more stools, some newborns have stools on their diapers every time they change diapers, but the stools are more uniform, not much water, no mucus or occasionally with a little milk lumps. If your newborn has an increased number of stools, watery stools, egg-flake soup-like stools, foamy or bloody stools, dark stools, and white stools, it is an abnormality and you need to seek medical attention promptly.