With the prolongation of pregnancy, both estrogen and prolactin in the pregnant woman’s body will gradually increase, and under the influence of hormone levels, the breast tissue will undergo changes in the secretory phase, with hyperplasia of the ductal epithelium of the mammary glands and proliferation of connective tissue cells. Normally, during pregnancy, prolactin cannot bind to the prolactin receptor in the breast tissue because of the large amount of estrogen competition, and lactation begins only when the estrogen level drops after the birth of a child and prolactin binds to the receptor in the breast tissue. If the local breast tissue is very rich in prolactin receptors, the binding of prolactin to prolactin receptors may occur during pregnancy, resulting in overgrowth of the local breast tissue, abnormal secretory changes in the local glands, and the formation of adenopathy-like tumors. ? Many experts believe that adenopathy can be observed first, but adenopathy forms tumor-like changes with intact peritoneum and huge volume, which oppresses normal breast tissues and seriously threatens the patient’s health. Physicians and patients are concerned about surgery mainly because of the fear of surgical irritation, anesthetic stimulation causing miscarriage or effects on child development.