The process of milk production involves the secretion of lactogen by the pituitary gland, which stimulates the synthesis and secretion of milk from the breasts. Normally during pregnancy, the ovaries secrete large amounts of estrogen and progesterone, which stimulate the development of the milk ducts and alveoli. However, there is no milk secretion at this time because the anterior pituitary gland is inhibited by estrogen and progesterone before delivery and does not begin to secrete prolactin until after delivery. At about 7 weeks of gestation, the pituitary gland begins to secrete prolactin, which reaches its peak before childbirth. After delivery the levels of estrogen and progesterone drop dramatically and no longer suppress prolactin. There may be a small amount of yellowish fluid spilling from the nipple, usually of a thin texture, called colostrum. The nutrients in breastmilk are easily absorbed by the baby and can well promote normal development of the baby, so breastfeeding is recommended. If a mother experiences abnormal milk secretion during pregnancy, it is recommended that she seeks medical attention in a timely manner, and under the guidance of a doctor, complete the relevant examinations to clarify the cause of the problem and treat it appropriately.