If there is no desire to become pregnant and no contraception is used during intercourse, it is best to use an effective method of contraception after intercourse. Even if you do not have intercourse at the time of ovulation, the safe period method of contraception is not reliable and pregnancy is still possible. If you do not want to take oral emergency contraceptive pills, you can only take the method of placing an intrauterine device (IUD). It is applicable within 5 days after unprotected sex. Provided that long-term contraception is desired and there are no contraindications to IUD placement. Emergency contraceptive pills can only be used as a temporary contraceptive measure because they contain a large amount of progesterone, which has an adverse effect on ovarian function and cannot be used as a long-term contraceptive method. If there is no intention to get pregnant in the near future, you can take oral short-acting contraceptive pills or use condoms. In order to avoid unwanted pregnancy to do abortion, if often abortion is very harmful to the body, not only will affect the menstruation, but also a variety of gynecological diseases, and in serious cases will cause difficulty in conception.