Having intercourse just after ovulation does not necessarily result in pregnancy. Generally about 14 days before the next menstrual period is the day of ovulation, five days before and four days after the day of ovulation belong to the ovulation period. After the ovulation period should belong to the safe period, the safe period is usually seven days before and eight days after the menstrual period, this time in the normal menstrual cycle, there is no ovulation, so the chances of pregnancy are relatively small, but does not mean that it can be completely contraceptive, mainly depends on whether the ovulation is regular. It is recommended that for safety reasons, if the next menstrual period is delayed for about 7-10 days, you can use early pregnancy test paper or do blood HCG test to observe whether there is pregnancy. It is best to use contraception during intercourse to avoid unwanted pregnancy, and choose the best contraceptive method according to your health condition.