Can you have sex on the first day of your period?

Patient's question:

No

Doctor's answer:

During menstruation, sexual activity should be avoided regardless of the amount of bleeding, because the cervix is in a slightly open state, the endometrium sheds, leaving a wound, making it easy for bacteria to invade and cause reproductive tract infections, diseases, or affect future fertility. Sexual stimulation can also prolong bleeding duration and increase blood volume, leading to menstrual changes such as irregular cycles, altered menstrual periods and flow, and severe endometrial damage may affect future fertility.