The following examinations are required before doing abortion: 1. routine examination: such as ultrasound, vaginal discharge, gynecological internal examination, mainly to observe whether the patient is intrauterine pregnant, the size of the gestational sac, whether abortion can be done, and to observe whether there is any abnormality in the patient’s reproductive tract and whether there is any acute infection; 2. blood examination: including blood routine, coagulation function, blood type, liver and kidney function and antibodies to four diseases, to observe whether the patient The blood test: including blood routine, coagulation function, blood type, liver and kidney function and antibodies to four diseases, to observe whether the patient has abnormal blood clotting and liver and kidney function, and to observe whether there is hepatitis B, syphilis, AIDS and other infections; 3. ECG and urine test: to observe the heart function and whether there is urinary system infection; 4. general examination or vital signs test: mainly including blood pressure, pulse, body temperature, heart rate, etc., which are usually checked before the surgery.