If you have sex at the age of 15, it may cause pregnancy. The onset of menstruation during puberty is usually around the age of 12, with some women advancing or postponing it by 1-2 years.At the age of 15, our menstrual regulation mechanism may have been perfected, and the onset of menstruation may lead to ovulation, and ovulation may lead to pregnancy, so there is a possibility of pregnancy at the age of 15. Of course, it is not recommended for women to have sex so early, the first will lead to pregnancy, which will cause great damage to the female body; the second puberty is the period of development of all body functions, early sexual intercourse will cause all kinds of infections, so I hope that women do not have sex too early.