The supplementation of pure milk during pregnancy is beneficial to the supplementation and absorption of calcium, protein and vitamins, as well as the regulation of endocrine, which is beneficial to the health of pregnant women and fetuses. 1, supplemental calcium: pure milk is rich in calcium, iron, zinc and other trace elements, which can promote bone growth and development. Pregnant women insist on drinking 250-300ml of milk every day to prevent calcium deficiency during pregnancy, which is beneficial to fetal development; 2, supplemental protein: pure milk is rich in amino acids, which is the main source of high-quality protein and helps pregnant women to supplement protein; 3, supplemental vitamins: pure milk contains vitamin A, vitamin B, vitamin D and carotene needed by the human body, drinking milk is beneficial to the human body to supplement the lack of 4, promote digestion and absorption: pure milk is rich in triglycerides, lactose and a small amount of phospholipids and cholesterol, triglycerides, phospholipids and cholesterol are easily absorbed, lactose in the intestine can promote the absorption of calcium, iron, zinc and other minerals, improve their bioavailability, help improve the human micro-ecological balance, promote digestion and absorption; 5, regulate endocrine: the protein in milk can improve human 5, regulating endocrine: the protein in milk can improve human resistance, regulate endocrine and improve microcirculation in the body. Milk has a sedative and hypnotic effect, can eliminate tension, a glass of milk before bed helps sleep.