It is rare for a woman to have intercourse on the 2nd day after her period, but it may be due to the fact that during this period the egg is discharged from the ovary and the sperm and egg are able to unite and develop into a fertilized egg, thus causing the woman to become pregnant. It may be related to the short menstrual cycle of a woman, for example, a menstrual cycle of 23-24 days, a long period of about 9 days, and the second day after menstruation, which corresponds to the middle of the menstrual cycle, may cause a woman to become pregnant due to the discharge of the egg, the chance of which is less than 10%. Most women have a menstrual cycle of 30 days, with a period of 3-7 days. Ovulation occurs about 14 days before the next period, which is the day of ovulation, and the chances of pregnancy are higher if you have intercourse during this period.