The so-called danger period refers to the 3 days before and after ovulation, which is the 3rd day after ovulation. If you have sex at this time, you have a higher chance of getting pregnant because the egg can be alive in your body for up to 72 hours after ovulation. If you have sex on this day without using contraception, you have a higher chance of getting pregnant. Therefore, if you do not have a need to have children, you should try to avoid ovulation during intercourse. It is also not recommended to use the safe period method of contraception, because this method of contraception is not reliable and is only suitable for infrequent sex. If you have sex often, you should still take safe and effective contraceptive measures. Like using a condom, or a birth control ring, etc.