Women taking birth control pills need to get pregnant after 3-6 months of unwanted withdrawal. As early as 1985, Harlap et al. conducted clinical observation on 33,545 pregnant women, among the 8,522 women who had been taking contraceptive pills and became pregnant within 1 month of stopping the pill, the incidence of malformations in their babies was 17.2 per thousand, compared with the incidence of malformations in babies born to 25,023 women who used other contraceptive measures or did not use contraception (1.50%-2.01%), and there was no statistically significant difference between the two. There was no difference in the incidence of fetal malformations between the two. The use of contraceptives by women of childbearing age or the accidental use of contraceptives during pregnancy does not cause malformations in newborns. Moreover, the contraceptive pills currently used in clinical practice are excreted or cleared within a short period of time after taking the pills. Ovulation can be resumed about 2 weeks after stopping the pill. Therefore, pregnancy can be considered after stopping the pill without waiting for 3 to 6 months.