What are the consequences of having sex during menstruation?

Having sexual intercourse during menstruation may lead to various adverse consequences: 1. Increased risk of infection: During menstruation, the cervix is open and the endometrium is shedding, creating exposed surfaces. Sexual activity may introduce bacteria into the vagina, potentially causing gynecological inflammations such as vaginitis, pelvic inflammatory disease, and endometritis. 2. Endometriosis: Uterine contractions during sexual intercourse may cause retrograde menstrual flow, allowing endometrial fragments to enter the pelvic cavity, potentially leading to endometriosis, which may result in dysmenorrhea and infertility. 3. Menstrual irregularities: Sexual activity may cause increased menstrual bleeding, prolonged menstruation, and other symptoms of menstrual disorders, and even lead to anemia due to excessive blood loss. 4. Immunological infertility: Having sex during menstruation may cause women to develop anti-sperm antibodies, leading to immunological infertility.