You can’t get pregnant if you have sex during menstruation. In order for conception to be successful, there must be a combination of sperm and egg. When the ovaries have mature eggs to be able to conceive, the ovaries are not mature eggs, so sex during menstruation will not be pregnant. Although you can’t get pregnant during menstruation, it’s not recommended to have sex during menstruation. The reason is that during menstruation, women’s resistance is relatively low, and the cervical opening is in an open state, so having sex at this time is likely to cause upward infection, causing endometritis. Sex during menstruation stimulates the uterus, which can lead to an increase in menstrual flow. Avoid sex during menstruation. If you have sex during menstruation, it is recommended that you use a condom to prevent upward infections and minimize the damage to your body.