Lactation is the period after a woman gives birth when she breastfeeds her baby until she stops. There are individual differences in the length of the breastfeeding period, which is currently around 10-12 months for most of the population. The World Health Organization recommends breastfeeding for at least 2 years, because breastfeeding has a very important role in the development of newborns and early childhood, and recommends that women who are in a position to do so, extend the duration of breastfeeding appropriately. Breastfeeding precautions: 1, eat a balanced diet, eat nutritious food, avoid partiality, eat fresh fruits and vegetables, eat iron-rich foods, such as lean meat, spinach and fish, eat dairy and soy products, increase calcium and protein intake, to ensure that the body’s nutrition and milk secretion; 2, during breastfeeding as little as possible to eat puffed up, deep-fried, barbecue, spicy and stimulating, cold and cold nature of the food, the Drink as little as possible carbonated beverages and stimulating beverages, do not take oral medications, so as not to cause diarrhea, allergies and other adverse reactions in infants; 3, breastfeeding to develop good breastfeeding habits and feeding posture, to avoid nipple bite. Pay attention to good breast cleanliness and hygiene, wash the residual milk after breastfeeding to prevent the occurrence of mastitis. 4, breastfeeding may also be pregnant, should pay attention to good contraceptive measures to avoid pregnancy.