There are several methods of contraception for women: the first is to use a condom, and to use it throughout sex, and to check if there are any small holes in the condom before using it, so that semen does not flow into the vagina through the holes and cause pregnancy. Secondly, the IUD can be inserted within 3-7 days after menstruation, which is one of the most popular contraceptive methods in clinical practice. Third, you can have ligation surgery, in the clinical principle of voluntary, if you want to ligation, it is best to go to the hospital 3-7 days after menstruation to give ligation. The fourth, you can use the method of safe period contraception, this case must be very regular menstruation, can accurately calculate the date of ovulation, and then according to the date of ovulation and then projected ovulation, so that sex outside the ovulation period will not lead to pregnancy.