The enlarged uterus can be divided into physiological and pathological enlargement, which is caused by pregnancy and childbirth. Pathological uterine enlargement is mainly due to organic lesions, such as inflammation, uterine fibroids, myometriosis, hyperemesis gravidarum and so on. A, physiological reasons there are some women, born with a relatively large uterus, pregnancy may make the uterus will continue to increase with the pregnancy, the uterus will often be slightly larger after childbirth. If the nutritional status is good and there are no clinical symptoms, there is no impact on the organism and no need for intervention. Second, pathological causes 1, inflammation: for example, the more common clinical endometritis, pelvic inflammatory disease, cervicitis and so on, due to frequent sex or poor hygiene, resulting in the occurrence of various inflammatory diseases, will cause the uterus to increase; 2, uterine fibroids: generally manifested as solid nodules with clear borders in the myometrium, fibroids combined with an enlarged uterus, usually the increase is not obvious, no clinical symptoms, no There is no need for treatment. However, if the fibroids are large in size and have clinical symptoms, such as excessive menstrual flow or even combined with anemia, surgery is recommended. As for the surgical method, according to the fertility requirements, the uterine fibroids should be removed to preserve fertility or hysterectomy without preserving the fertility function; 3. Myometriosis: caused by ectopic endometrial tissue to the myometrium, myometriosis sometimes also has solid nodules, but the boundary is not clear, sometimes it shows diffuse thickening of the myometrium, especially the posterior wall of the uterus. There may be significant clinical symptoms such as dysmenorrhea and menstrual disorders. Usually, those with mild symptoms can be treated conservatively with medications, such as oral short-acting contraceptives mifepristone, and the Manned IUD. For those whose symptoms are too serious and painful to tolerate, sometimes hysterectomy is needed; 4. Gravida: Gravida is the proliferation of placental villi trophoblast cells after pregnancy, and the interstitium is highly edematous, forming one blister after another, and the blisters are connected in bunches, shaped like grapes, so it is called gravida. When the gravida grows rapidly, the uterus will also increase significantly. If the patient is confirmed to be a gravida, it is recommended to remove the gravida quickly in this case. If the gravida is found to be malignant, the patient is advised to have the uterus removed if there is no requirement for fertility.