2. You can still get pregnant.
Just because you have your period doesn’t mean that you’re in the clear when it comes to pregnancy prevention. “A lot of people think that if they’re bleeding they don’t need to worry about pregnancy or using protection, and while theoretically that’s true, it isn’t always the case,” cautions Streicher.
Because sperm can live in a woman’s body for up to 5 days, “if you have sex towards the end of bleeding, you can actually conceive 4 or 5 days later if you ovulate early,” says Hechtman. “So I wouldn’t use that as contraception.”
And because some women bleed during ovulation, they may mistake it for their period and end up having unprotected sex during their most fertile window.