If there is a gestational sac near the left uterine horn, it is considered to be a uterine horn pregnancy, which is categorized into two types, i.e., type I and type II. Type I can continue the pregnancy under close monitoring, while type II requires termination of the pregnancy. 1. Type 1 uterine horn pregnancy: most of the gestational sac can be seen in the uterine cavity under ultrasound, and the convexity of the uterine horn is not obvious, which is safer, and the gestational sac can grow towards the uterine cavity at a later stage, and most of the pregnancies can be carried out to the middle or late stage. So there is no abdominal pain and other discomforts, it is recommended to check the blood HCG and ultrasound on a regular basis, do not exercise strenuously during the observation period, and consult the doctor in case of vaginal bleeding and abdominal pain. 2. Type 2 uterine horn pregnancy: the gestational sac mainly grows towards the outside of the uterine cavity, and the uterine horn is obviously convex. This type of pregnancy is more risky, with the growth of the gestational sac, the uterine horn will rupture, the pregnant woman may have intra-abdominal bleeding, shock, and in severe cases, death. Therefore, surgical treatment should be adopted, such as negative pressure suction under ultrasound monitoring, and hysteroscopy can be chosen to remove the gestational sac if the operation is difficult. The exact reason for the occurrence of uterine horn pregnancy is unknown, and its treatment in general has to be decided by the doctor’s comprehensive judgment. After the treatment of this disease, the chance of ectopic pregnancy is higher after pregnancy again, no childbearing requirements should be strictly contraceptive, and those who have childbearing requirements should be pregnant again as soon as possible to carry out ultrasonography to clarify the location of the gestational sac.