The best time to perform a minimally invasive abortion is between 45 and 60 days of menopause. This is the best time to perform the procedure because the size of the gestational sac is appropriate during this time. Before the abortion, ultrasound examination should be performed routinely to know whether the size of the gestational sac matches the number of days of menopause. If the size is suitable, some preoperative examinations can be performed routinely, such as routine leukorrhea examination to know whether there is any inflammation of the vagina, routine blood examination, examination of infectious diseases, including syphilis, hepatitis C, hepatitis B and AIDS, and electrocardiogram examination. If there is no abnormality in the examination, the patient can fast for 4-6 hours before the operation and choose microtube abortion under ultrasound monitoring to terminate the pregnancy, and after the operation, anti-inflammatory and uterine contraction treatment should be given.