A woman can’t get pregnant if she has intercourse more than a month after giving birth. This is because during this period the hormones secreted by the ovaries are not stable and there will be no ovulation, and the endometrium will not undergo cyclic stripping, so the woman will not get pregnant. In rare cases, if a woman does not breastfeed for more than a month after giving birth, or if her ovaries recover well and she does not use contraception, and then ovulation occurs when she has intercourse again, pregnancy may occur again, but the chances are small. Women should also place an intrauterine device or use a penis condom to prevent pregnancy after the puerperium to avoid unwanted pregnancies, which can affect a woman’s health. Under normal circumstances, if a woman gives birth vaginally, the end of the puerperium can have proper coitus, and cesarean section needs to be more than three months after delivery before coitus.