If you want to get pregnant, whether you have intercourse before or on the day of ovulation, or after ovulation, you will have the possibility of getting pregnant. You should understand the survival time of the egg. The egg has a relatively short survival time after ovulation, and if it is not fertilized, it will die naturally in 24 hours, and the sperm has a longer survival time, usually 2-3 days. Therefore, if you calculate your ovulation date, you can choose to have intercourse during the ovulation period, for example, if you have your period on the 30th, basically the time of ovulation is around the 16th, on the day of the 16th or two days before or 1-2 days after the 16th, the chance of pregnancy is clinically very high, because the calculated ovulation date is not absolute, it may be a day earlier or a day later.