For women who have a long menstrual period, for example, 7-10 days, 5 days after menstruation is equivalent to the 12th-15th days of menstruation, and it is likely to get pregnant during this period. If the menstrual cycle is relatively stable, usually more than 20 days for a menstrual cycle, 5 days after menstruation is equivalent to the 12th-15th day of menstruation, and it is likely to get pregnant during this period. For women with irregular periods, such as those with a menstrual cycle of 40 days or even longer, with a short period of 21-22 days, the ovulation time of such women is uncertain, so having intercourse 5 days after the period may also lead to pregnancy. For women who have a short menstrual period, only 3-5 days, and a fixed menstrual cycle, around 30 days, 5 days after menstruation is equivalent to the 10th day of the menstrual cycle, and the pregnancy rate of intercourse in this period is relatively low.