3. There’s no increased risk of STDs.
Some sources say that the risk of STD transmission could increase during menstruation. One explanation for this is that a woman’s cervix is slightly open at this time to let blood out. Streicher explains that, in theory, since STDs like gonorrhea and chlamydia are ascending infections, anything that facilitates them traveling up into the uterus could increase the possibility of transmission—again, in theory. No studies have backed this idea up.
No matter what, it’s crucial to remember that just because there isn’t necessarily an increased risk doesn’t mean that there’s no risk. Stick to your typical STD prevention regimen during period sex.