Before doing abortion surgery, there are more tests needed, mainly including the following three aspects: first, blood related tests, mainly including blood routine, blood type, coagulation function, liver function, kidney function, and four disease antibodies. Secondly, it is mainly imaging related examination, including electrocardiogram and gynecological ultrasound. Third, it is mainly gynecological related examination, including gynecological internal examination and examination of vaginal secretion. These examinations are mainly to rule out contraindications to abortion, such as abnormalities in liver and kidney function, or inability to perform abortion when there are inflammatory gynecological diseases. They are also designed to determine whether the pregnancy is intrauterine and whether the size of the gestational sac is suitable for abortion. The patient must pay attention to the fasting test when doing the pre-abortion examination.