Patients with polycystic ovary syndrome do not cause embryonic arrest if they become pregnant. The cause of embryonic arrest is mainly due to a genetic deletion. In addition, the embryonic arrest can be caused by serious medical problems of the pregnant woman, such as blood clotting disorders, kidney failure, etc. The embryonic arrest can also be caused clinically by high fever and other diseases of the pregnant woman. Therefore, embryonic arrest can be caused by many factors, the most important one being the genetic deficiency of the embryo. Therefore, in patients with polycystic ovary syndrome, if the embryo stops developing after pregnancy, it is important to find the cause.