Compared to abortion, abortion is more damaging to the uterine lining and the body. Induced abortion uses negative pressure suction, which increases the pressure in the uterine cavity through negative pressure to suck out the pregnancy tissue, which may damage the basal layer of the uterine lining, resulting in no menstruation, low menstrual flow or uterine adhesions later. The abortion is usually performed by oral administration of mifepristone and misoprostol, which cause the uterus to contract and squeeze out the pregnant tissues naturally through the action of drugs, without uterine cavity manipulation, with minimal damage to the endometrium and endocrine system. Even if about 15-20% of people have an unclean abortion and need to have another cleanup, the cleanup procedure is much less damaging than the abortion. Therefore, for patients without special circumstances, it is generally recommended to choose the less damaging medical abortion.