The absence of menstruation may be due to pregnancy, but it may also be due to ovarian dysfunction and other reasons. 1. Pregnancy: Women who have sex without proper contraception are likely to get pregnant, and the most obvious symptom of pregnancy is the cessation of menstruation, so women who experience delayed menstruation should pay attention to exclude the possibility of pregnancy. 2. Ovarian dysfunction: Women are prone to ovarian dysfunction due to various reasons such as dieting and environmental changes. At this time, it is easy to appear menstrual disorders, menstrual delay. Therefore, if women do not have menstruation, it is possible that they are pregnant, but it is also possible that it is caused by ovarian dysfunction, etc. It is recommended that women go to the hospital as soon as possible to find out the cause of the problem and treat it as soon as possible.