You can determine whether the supply and demand of breast milk is balanced by the number of feedings, urination and defecation, and the growth and development of the baby. 1. The number of feedings: If the mother’s milk is better, she can feed the baby about 8 times a day, and the interval between each feeding can reach 2~3 hours, which is better for the baby’s development and sleep, then it can show that the supply and demand of breastmilk is balanced. 2. urination and defecation: generally speaking, breastfeeding the baby enough to urinate about 10 times a day, stool in about 2 times, can be regarded as breast milk supply and demand is balanced. 3. Baby’s growth and development: you can observe the baby’s growth and development, sleep, etc. to determine whether the supply and demand of breast milk is balanced, if the baby is irritable after feeding, still looking for the nipple, it means that the baby has not eaten enough. If the baby does not cry after feeding, rosy cheeks, sleep peacefully, that the breast milk supply and demand is balanced.