Is it safe to have sex during menstruation?

Patient's question:

Detailed medical condition and consultation purpose: This month, my girlfriend and I had sex when her period was almost over. We didn't use any protection, and the sperm was inside her. Later, we found out that her period hadn't stopped. Will she get pregnant? Is it easy for her to get infections? Thank you

Doctor's answer:

In this case. If you have sexual intercourse during your menstrual period. It is very easy to cause vaginal infections. Because this is when your immunity is at its lowest. I suggest that you should not have intercourse like this next time. Now, pay attention to personal hygiene to prevent infection. There is no need for special treatment for the rest.