The end of menstruation 3-4 days intercourse, if ovulation is not advanced, it is not easy to get pregnant; if ovulation is advanced, it may be pregnant. If ovulation is normal, 3-4 days after the end of menstruation, the ovaries have not ovulated, at this time intercourse generally does not occur sperm and egg combination, and will not be pregnant. If ovulation is early, even if the period is over for 3-4 days, the ovaries may ovulate, and intercourse without contraception may result in sperm-egg union and pregnancy after successful implantation. Whether or not intercourse three or four days after the end of menstruation is likely to result in pregnancy depends on whether or not ovulation occurs early. If you want to get pregnant, you should have intercourse at the time of ovulation; if you don’t want to get pregnant, you should use contraception. Keep the pubic area clean before intercourse to avoid pathogen infection. If the patient is not feeling well after intercourse, he or she should seek medical advice and treatment under the guidance of a doctor to avoid delaying his or her condition.