You can take emergency contraceptive pills if you have intercourse 20 days after the abortion. After the abortion, you need to have a menstrual period 3 days after the abortion and it will affect the contraction of the uterus if you have intercourse too early. After the abortion surgery will cause irregular menstruation, ovulation will also be irregular, so it is safe to take emergency contraceptive pills during the period. In the oral emergency contraceptive pill, must choose fasting or 2 hours after meals oral, oral within 2 hours can not take any food, water, to avoid affecting the effect of emergency contraceptive pills. At the same time, you can also add vitamin C together oral, so as to reduce the adverse effects of emergency contraceptive pills. Emergency contraceptive pills are not 100% contraceptive, you can buy a pregnancy test 12 days after intercourse, without menstruation, to rule out the chances of pregnancy.