Painless abortion can be performed at ten weeks of pregnancy. The main indications for abortion are within 49-70 days of menopause. Firstly, ultrasound examination determines that the pregnancy is intrauterine and that the embryonic development is complementary to the days of menopause, and secondly, blood routine and coagulation are checked for no significant abnormalities and the surgical operation can be performed. The abortion procedure is mainly performed to solve the troubles caused by unwanted pregnancy, that is, unintended pregnancy. Another is the need to terminate a pregnancy due to medical reasons, such as abnormal development of the embryo itself. The main procedure of abortion is to mechanically dilate the cervical opening to the desired level, and then to completely aspirate the pregnancy from the uterine cavity by means of negative pressure suction.