The gestational sac is 0.9×0.6cm and the yolk sac must be visible before abortion can be performed. If you can’t see the yolk sac after several checkups, it means that the embryo has stopped developing, and what you need to do is not abortion but uterus removal surgery, and you need to check whether the coagulation function is normal or not before the surgery. Because if the embryo stops developing, often cause pregnant women coagulation dysfunction, often lead to a large amount of bleeding when doing the operation, and cause the patient the possibility of hemorrhagic shock. So be sure to check clearly before the operation, and then only in doing the operation. In addition, before the operation, you also need to do routine blood tests, routine leukorrhea tests, and electrocardiograms, all of which are qualified before you can make an appointment for an abortion.