Can a couple have sex two days before menstruation?

Patient's question:

No

Doctor's answer:

There is a possibility of infection. Intercourse is prohibited during menstruation because the endometrium forms wounds during this period, and the immunity of various systems decreases, making it easy to cause inflammatory infections such as endometritis, pelvic inflammatory disease, and adnexitis. Additionally, during female sexual arousal, uterine contractions may cause menstrual blood to flow back into the pelvic cavity.