The frequency and nature of stools in infants and young children are closely related to the child’s age and diet. The frequency and nature of stools may vary considerably from age to age and from diet to diet, yet so many different kinds of stools may be completely normal. In general, normal stool contains 80% water and the rest is mainly food residue, including some amount of neutral fat, fatty acids, incompletely digested protein, carbohydrates, and minerals, mainly calcium salts. There is also a large amount of commensal bacteria, which can also carry a small amount of mucus. Let’s talk about what normal stools look like at different ages and dietary status: 1, fetal stool Newborn babies will defecate within 3 days of birth. Fetal stool is black green, dark green or dark green, sticky like asphalt, no odor, is composed of shed epithelial cells concentrated digestive juices and amniotic fluid drunk during the fetal period. If the number of breastfeeding enough, 2-3 days after the fetal stool will be exhausted into normal baby stool. 2, exclusively breastfed baby stool exclusively breastfed baby stool is yellow or golden yellow, uniform paste or with a little yellow stool particles, occasionally slightly dilute and slightly green, odorless, sour taste, acidic reaction (pH 4.7-5.1), daily bowel movements can be 2-8 times, but also sometimes several days before a bowel movement. Generally in the gradual addition of complementary foods after the number of stools decreased, 1 year after the reduction to about 1 time a day. 3, artificial feeding baby stool completely formula-fed baby stool is light yellow or grayish yellow, dry and thick, neutral or alkaline reaction (pH 6-8), because the milk contains more protein, there is an obvious odor, 1-2 times a day. Fresh cow / goat milk-fed baby stools are easily mixed with white casein clots. 4, mixed feeding baby’s stool After adding starchy complementary foods, baby stool volume will increase, the consistency slightly reduced dark brown, the odor increased, if you add vegetables and fruits, stool appearance will gradually approach adults. When first adding pureed vegetables, often a small amount of green vegetable puree with the stool discharge, do not be nervous, this is a common phenomenon of new complementary foods, observe a few days, if no obvious discomfort can continue to add, wait until the baby’s intestinal tract to adapt to the stool will gradually return to normal color.