20 1 1 the latest survey in world contraception day shows that there are more than 8 million induced abortions in China every year, and the rate of repeated abortions is as high as 50%. Repeated abortion is extremely harmful to female reproductive health. The more times of induced abortion, the higher the incidence of complications and sequelae of abortion. Research data show that the incidence of complications in women who have repeated abortions for more than three times will be higher than 34.62%. Repeated abortion will also bring long-term harm to fertility. Research shows that 88.2% of secondary infertile women have had a history of abortion. The abortion probability of normal delivery is 2.5 times that of those without abortion history, and the premature delivery rate is 5.44 times that of 1 abortion. Lack of contraceptive knowledge after abortion leads to a high rate of repeated abortion. PAC service aims to reduce the rate of repeated abortion and protect reproductive health. The staff of PAC clinic will introduce the knowledge of contraception after abortion in detail, so that the majority of women can use contraception scientifically and stay away from abortion.