The operation of painless abortion in the clinic is the same as that of other abortions, except that before the operation, anesthesia is injected through the vein to make the patient go to sleep, and then the operation is completed under the condition of no pain at all. The main thing is to first dilate the uterus, and then connect the suction device to the uterine cavity, through the negative pressure, so that the intrauterine pregnancy products are sucked out, so as to achieve the purpose of terminating the pregnancy. Clinically abortion through artificial negative pressure may cause perforation of the uterus and likewise may lead to infection. Therefore, if a woman is not planning a pregnancy, it is best to avoid frequent abortions that can cause great harm to the body, despite the fact that painless abortions are relatively painless.