Unicornuate uterus is an abnormality in the morphology and structure of the uterus caused by an abnormality in the female reproductive tract during embryonic development. Such a uterus usually has only one side of the fallopian tube, and the volume of the uterine cavity is often smaller than that of a normal uterus, resulting in a relatively low pregnancy rate and a tendency for intrauterine growth retardation, malformations and miscarriage or preterm delivery in the middle and late stages of pregnancy. Therefore, the development of the fetus is closely monitored after pregnancy. Longitudinal uterus is the more common type of uterine malformation, most of them can be pregnant and deliver normally, but a few of them may have infertility, embryonic arrest, intrauterine growth retardation and intrauterine death, because longitudinal uterus has less blood vessels and more fibrous tissue than normal uterine muscle layer, which prevents normal implantation. In addition, the endometrium covering the septum responds poorly to hormonal stimulation, and the mediastinum can prevent normal placental growth, leading to early fetal death or growth retardation. It can be removed under hysteroscopy, which is a more common procedure in infertility treatment and has a high success rate. The morphology of the uterine cavity is normalized to 90% after the operation and the success rate of conception is over 95%.