What are the risks of having sex during menstruation?

Having sex during menstruation can lead to various health risks. Since menstrual blood serves as an excellent culture medium for bacteria and other microorganisms, sexual activity may cause upward bacterial infection, leading to gynecological conditions such as endometritis and pelvic inflammatory disease. Sexual intercourse during menstruation may induce uterine contractions, increasing the risk of endometriosis, which can result in severe dysmenorrhea and infertility. During menstruation, the cervix is open; intercourse may allow shed endometrial tissue to enter the bloodstream and travel through the fallopian tubes into the abdominal cavity, potentially triggering endometriosis. Additionally, sexual activity during this period may cause increased menstrual flow or prolonged bleeding, disrupting the normal menstrual cycle. To protect women's health, it is strongly recommended to avoid sexual intercourse during menstruation. If any discomfort or abnormal symptoms occur, prompt medical evaluation and treatment are advised.