Longitudinal uterine septum is a type of uterine malformation that can alter the symmetrical shape of the uterine cavity and may interfere with normal reproductive function. It predisposes to infertility or habitual miscarriage, with 40% reported to cause infertility and 38% having a history of at least 2 or more miscarriages prior to diagnosis. What are the common symptoms of mediastinum? Most patients with longitudinal uterus are clinically asymptomatic, some of them may have increased menstruation; however, most of them have a history of recurrent miscarriage, infertility, preterm delivery and abnormal fetal position, some of them are found during cesarean section or abortion curettage; secondly, some of them are found during pelvic examination. The incidence of intrauterine fetal growth retardation and intrauterine fetal death is also higher in longitudinal uterine septum even if pregnancy occurs, because longitudinal uterine septum has fewer blood vessels and more fibrous tissues than normal uterine muscle layer, which prevents normal implantation; in addition, the endometrium covering the septum reacts poorly to hormonal stimulation, and longitudinal septum can prevent normal placental growth resulting in early fetal death, and if pregnancy can continue, it is also easy to develop intrauterine growth retardation. Longitudinal uterus is usually diagnosed by vaginal ultrasound, and is easily confused with a bicornuate uterus. A more accurate differential diagnosis is to do an MRI of the pelvis. The hysteroscopic diagnosis and treatment of longitudinal uterus with hysteroscopy is simple and quick, with short operation time, little bleeding, little trauma, quick recovery, only three months of contraception after the operation, and pregnancy can be obtained as soon as possible, and the integrity of the uterine wall is maintained during the operation, and vaginal delivery is possible. The timing of hysteroscopic surgery for longitudinal uterine septum: the sooner after the menstruation is clean, the better. It is not better to operate 3-7 days after menstruation as it is usually said. This is because after the surgery to correct the longitudinal septum, you need to take estrogen to allow the trauma of the uterine cavity to be repaired. The best time for repair is during the first half of the menstrual period before ovulation. If the surgery is done in the middle of the menstrual period close to ovulation, there will be no endometrial lining to repair the trauma in the uterus if estrogen is taken at this time. Longitudinal uterine diaphragm may also occur after hysteroscopic removal and therefore must be treated with medication to repair the endometrium after surgery, which is as important as the surgery. The details are as follows: First week after surgery: 4 tablets of Tocopherol taken orally once a day for 7 days. Second postoperative week: 3 tablets of Tegretol once a day orally for 7 days. The third week after surgery: 1 tablet of Glaxo once daily orally for 7 days. At the same time, take 1 tablet of Daphne twice daily, one in the morning and one in the evening, orally for 7 days.