Normally, if you have intercourse about 10 days after your period, your chances of pregnancy will increase. The ovaries can only ovulate once a month, and women with regular menstrual cycles have cycles of 28-30 days, with periods of 3-7 days. If you have intercourse during this period, the egg and sperm can unite and develop into a fertilized egg, which will lead to conception. If the menstrual cycle is irregular and there is early or late ovulation, it is not entirely accurate to rely solely on the 10 days after menstruation as the day of ovulation to conceive. If you have high expectation of pregnancy, you can use ovulation test after menstruation, when the ovulation test is strongly positive, that is, when the luteinizing hormone in the body is increased, or when the vaginal discharge is transparent, most of the time there is a possibility of ovulation, and the chance of pregnancy will be greatly increased after intercourse.