A pregnancy in the right uterine horn needs to be treated with either termination or fertility preservation and observation, depending on the woman herself and her pregnancy. 1. Termination of pregnancy: If the gestational sac continues to develop in the direction of the uterine horn, it is necessary to terminate the pregnancy as soon as possible. This is because as the gestational sac grows larger, the muscle layer of the uterine horn will become thinner and thinner, which may easily lead to miscarriage, uterine rupture and hemorrhage, and may even endanger the life of the pregnant woman. 2. Fertility preservation and observation: if the pregnancy in the uterine horn, the gestational sac is extending towards the direction of the lower uterine cavity, then the pressure on the uterine horn will be relatively reduced, and it is possible to have a normal pregnancy until delivery. However, it is necessary to pay attention to the birth control observation, strictly follow the doctor’s instructions for regular review, avoid emotional fluctuations in daily life, minimize the activities, and promptly consult a doctor if there are uncomfortable symptoms. Pregnant women with right-sided uterine horn pregnancy, must promptly consult a doctor for examination, and actively carry out obstetric examination, under the guidance of the doctor to make the correct treatment measures.