If a pregnancy occurs in the uterine horns, it is generally more dangerous the greater the number of weeks of gestation. Because the uterus has a myometrial layer, which is ductile, it ensures that the uterus is not prone to rupture as it enlarges, whereas the myometrial tissue in the uterine horns is relatively weak, and if the gestational sac is rooted in the uterine horns, the myofibers in the uterine horns will gradually be stretched as the gestational sac enlarges. As the gestational week increases, the length of the muscle fibers reaches a certain level and may break, resulting in a prior rupture of the uterus or rupture of the uterus, leading to hemorrhage and threatening the life of the mother and child, so the larger the gestational week, the more dangerous it is. Regular ultrasound examinations are recommended during pregnancy to clarify the exact location of the gestational sac. If the gestational sac is toward the uterine horn, it is important to review the thickness of the myometrium at the corner of the uterus. If the muscle layer is weak during the review, prompt termination of pregnancy is recommended. If the gestational sac gradually moves towards the uterine cavity during the review, the pregnancy can be continued under close monitoring.