Normally, after the first intercourse of a virgin, the usual menstrual cycle is not delayed as long as there is no pregnancy. If the menstrual cycle is delayed after the first intercourse, the first thing to consider is whether the menstrual cycle is delayed due to pregnancy without contraception. Because a woman’s normal menstruation is controlled by the ovarian endocrine hormones to secrete and is not directly related to the first intercourse, usually the menstruation will not be postponed after the first time as long as there is no pregnancy. If there is a delay in menstruation for more than a week, it is necessary to use a test strip or pregnancy test to rule out pregnancy.