Is period sex safe? What to know before you try it

Is it actually safe?

Medically, there's no reason to avoid sex on your period. Menstrual blood isn't dirty, sex won't push blood "backwards" in a harmful way, and orgasms won't make your period worse. Whether you do it is purely about what you and your partner are comfortable with. Some people love it, some don't, and both are completely fine.

There are two real risks to know about, and they're the same ones as at any other time of the month: pregnancy and sexually transmitted infections.

Can you get pregnant from period sex?

Yes, it's possible. Sperm can survive inside the body for up to five days. If you have a short cycle (say 21 to 24 days) and ovulate early, sex near the end of your period can line up with your fertile window. Bleeding can also be mistaken for a period when it's actually mid-cycle spotting. Our page on getting pregnant on your period explains the odds in detail.

Lulu is not contraception

Lulu shows estimated fertile days to help you understand your cycle. Those estimates are not a way to avoid pregnancy. If you don't want to get pregnant, use contraception every time, including on your period.

STIs and HIV during your period

Infections like HIV and hepatitis B and C can be carried in blood, so contact with menstrual blood can raise the chance of passing them on. The cervix also opens slightly during your period, which may make it a little easier for infections to travel upward. Condoms or a dental dam lower the risk for everyone, whatever the cycle day. If you or a partner have a new partner, getting tested is a kind thing to do for both of you.

Possible benefits

• Cramp relief: orgasms release endorphins and make the uterus contract and then relax, which some people find eases period cramps. More in can an orgasm help cramps.
• Natural lubrication: blood can make lube less necessary, though you may still want some.
• Higher desire: some people feel more turned on during or just before their period. See sex drive through the cycle.
• Mood: closeness and release can take the edge off a low, crampy day.

How to make it less messy

• Put down a dark towel, or try the shower (lube helps here, as water washes natural lubrication away).
• Choose a lighter flow day, often toward the end of your period.
• Take out a tampon first. A menstrual disc can sometimes stay in for penetrative sex, but check the brand's instructions; a cup must come out.
• Keep wipes or a washcloth nearby and pee afterward.

And if you're not in the mood, that's fine too. Many people feel tired, bloated or tender on their first heavy days. Communication matters more than any rule.