1. attitudes and misconceptions about contraception among infertile women The most common cause of secondary infertility due to abortion [9] is bilateral tubal obstruction, accounting for 65.6%, followed by ovulation disorders, accounting for 16.2%, and in third place by uterine adhesions, accounting for 8.1%. The pathological basis for these results is that abortion disrupts the normal defense mechanism, causing endometrial damage, infection, endometrial fibrosis and other manifestations, resulting in pelvic inflammatory disease (PID) and traumatic intrauterine adhesions (IUA). Pelvic infection is closely related to tubal obstruction (OR=4.44), and PID increases the risk of ectopic pregnancy by 8-10 times, causing great harm to women’s body, especially reproductive health, especially repeated abortions; and women’s fertility recovers rapidly after abortion, and 83% of women can resume ovulation in the first cycle after abortion, so contraception after abortion is an urgent Therefore, post-abortion contraception is an urgent requirement for infertile women. In fact, after an unwanted pregnancy, most women of childbearing age pay close attention to contraception, and if the first abortion is due to a lack of attention to contraception, then repeated abortions are largely due to the misuse of contraceptive methods. The most common contraceptive methods used by infertile women are condoms and the oral contraceptive pill (OC), and there are few unintended pregnancies in which no contraceptive method is used. It is reported that the main reason for abortion: the proportion of unused contraceptives is as high as 50.3%; among those who have failed to use contraception, condoms account for 42.1%, oral contraceptives (OC) account for 14.9%, cannot adhere to and correctly use the intrauterine device (IUD) account for 22.8%, and others (safe period and in vitro ejaculation) 15.3%. A survey of abortion patients in Beijing and Dalian, Changsha also pointed out [4] that 47.7% did not use any contraceptive method, 53.3% failed, and the top three contraceptive methods were condom (26%), safe period (24.4%), and in vitro ejaculation (21.5%). Very few women who did not have children used IUDs for contraception and did not know much about them. A survey of IUD knowledge shows that 44 women aged 14-24 years old, 84% had a history of sexual life, 40% had heard of IUD, and only 1 had used IUD. 2, infertile women after abortion need to promote active contraception With the age of sexual life earlier and childbirth plans pushed back, women put forward the slogan of active contraception, through their own behavior to protect themselves from abortion. They need a form of contraception that is long-lasting, does not interfere with their sex life, and does not affect their future fertility. The choice of condoms Condoms are the most used and the only form of contraception that has been proven to play an important role in the prevention of STDs and AIDS. It is simple to use and plays an important role, especially during unsafe intercourse, but its effectiveness is influenced by the status of use. Among the contraceptive population, 65% had used condoms, but only 9.6% adhered to their correct use [4]; the use of condoms resulted in 41.5% of induced abortions and induced abortions, mainly due to the lack of adherence. Some reports showed that the overall incidence of sexual activity among college students was 27.5%, but the proportion of condom use every time was 29.44%, while the proportion of those who never used it was 17.30%. The correct use of condoms can effectively prevent sexually transmitted diseases, but the use of condoms depends on the male partner, and women are passive in the contraceptive process. In a survey of 2107 unmarried women in Shenzhen, 46.9% of the unmarried group had their partners unwilling to use condoms as the primary reason, while only 17.0% of the married group did so, with a statistically significant difference between the two groups (p<0.05). Advantages and disadvantages of taking short-acting contraceptive (OC) pills Compared with women without contraception, COC users have a significantly lower risk of PID RR=0.5 (0.4-0.6); the risk of first PID is only 1/3 of that of the former when taken for more than 1 year [11]; it can reduce the incidence of tubal infection by 50-80%. However, the contraceptive efficacy of oral contraceptives is also dependent on user adherence. A universal survey in the United States showed that the failure rate of OC use was 13.1% in women under 20 years of age and 8.2% in women over 30 years of age, with a higher failure rate in younger women using OC use. Another survey suggested that the rate of missed doses during OC use was relatively high among infertile adolescents, averaging up to 3 pills a week. Long-term oral contraceptives increase weight, blood clots and liver and kidney function damage and other risks, the need for regular checks, while oral contraceptives vaginal spotting bleeding is also the reason why many women can not adhere to. 3, the current situation of the use of intrauterine device (IUD) in infertile women after abortion IUD is the preferred method of contraception for fertile women, which has the advantages of reliable, simple, safe and reversible contraceptive effect, occupying more than 50% of the share of contraceptive measures for women of childbearing age in China. Doctors often do not recommend IUDs for infertile women because of concerns about pelvic inflammatory disease (PID), sexually transmitted diseases (STDs), and uncertainty about the effects on future fertility. However, IUDs are rated favorably by infertile women who have used them for contraception. In a survey, 273 infertile women in the IUD and OC groups were 68% and 71% satisfied with their contraceptive methods, respectively; and compliance was significantly better in the IUD group than in the OC group. Mirena, both the levonorgestrel intrauterine delayed-release system (LNG-IUS) is the most effective method of IUD and is the only topical hormonal method of birth control available. About the length of a thumb, the LNG-IUS consists of a small, flexible white T-shaped plastic frame that, when placed in the uterus, releases minute amounts of hormones in a quantitative manner from levonorgestrel medication stored in a vertical tube. The total amount of drug in the vertical tube is about 52 mg, and this tube in the uterus, will release 20 micrograms per day; its advantages are prevention of pelvic infection, endometriosis, reduction of ectopic pregnancy rate, effective control of menstrual flow, shortening of bleeding days, treatment of excessive menstruation and dysmenorrhea; side effects are spotting bleeding and possible temporary absence of menstruation. In a study comparing the effects of Mannorrhea and OC, satisfaction rates reached 89.7% and 87.7% in the Mannorrhea and OC groups, respectively. 117 Mannorrhea placements were followed up after one year, and 67% had a satisfaction score of 80 (out of 100) or higher.