The month in which milk appears during pregnancy depends on the individual’s physical condition, and usually a small amount of milk can be squeezed out of the breasts during the fourth to fifth month of pregnancy. However, it is not recommended to squeeze the breasts frequently because squeezing the breasts can cause irritation to the contractions of the uterus, which can lead to a risk of preterm miscarriage. The milk produced is a normal physiological reaction called colostrum, but the amount of milk is small, and only after the woman delivers the fetus and the placenta comes out will there be more milk produced, but the exact amount of milk will depend on the individual’s physical condition. Breast milk is rich in nutrients and contains more antibodies, so breastfeeding is recommended for the fetus. If a woman has colostrum during pregnancy, she should pay attention to breast care, avoid squeezing, keep her breasts dry and clean, wash them regularly, and do not wear clothes that are too tight.