Does My Birth Control Protect Against STIs?

For almost every method, no. Hormonal methods (the pill, patch, ring, and shot), long-acting methods (the implant and hormonal or copper IUD), withdrawal, and fertility-awareness are all designed to prevent pregnancy — they do nothing to stop sexually transmitted infections. The single exception is condoms. The CDC is explicit that condoms are the only contraceptive method that also reduces the risk of STIs and HIV. So being 'on birth control' and being protected from infections are two different things, and most methods cover only the first.

Only external ('male') and internal ('female') condoms. They work as a physical barrier that keeps semen, vaginal fluid, and skin-to-skin contact from passing infections along with sperm, which is why they lower the risk of STIs like chlamydia, gonorrhea, and HIV as well as preventing pregnancy. No hormonal method, IUD, implant, shot, or behavioral method does this — the hormones or the device change how or whether you get pregnant, but they never touch how infections are transmitted. If STI protection matters to you, condoms have to be part of the plan.

Dual protection means using two things at once to cover the two separate risks of sex: a reliable method to prevent pregnancy and condoms to prevent STIs. Because the most effective pregnancy methods (the IUD, implant, pill, and so on) offer zero STI protection, and condoms — while they do both — are less reliable than those methods for pregnancy on their own, the CDC-recommended approach for many people is to layer them: keep your chosen pregnancy method and add condoms every time. That way you're strongly protected against pregnancy and meaningfully protected against infections.

If you could be exposed to an STI, yes. The pill, IUD, and implant are excellent at preventing pregnancy but give no protection at all against infections, so a new partner, a partner whose status you don't know, or more than one partner are all reasons to add condoms on top. This isn't a knock on your method — it's just that pregnancy and STIs are different risks that need different tools. Many people in long-term, mutually monogamous relationships where both partners have tested negative choose to stop using condoms; that's a decision to make together, ideally after testing.

PrEP is a daily pill (or an injection) that dramatically lowers the risk of getting HIV, and it's worth asking about if HIV is a realistic possibility for you — for example if you have a partner living with HIV, you're a sexually active gay or bisexual man, you don't consistently use condoms with partners whose status you don't know, or you've recently had an STI. It works alongside, not instead of, condoms: PrEP prevents HIV but not other STIs, and condoms cover the rest. A clinician can confirm whether it's a fit; our PrEP eligibility check is a quick, private way to see where you stand before that conversation.

Yes. This tool runs entirely in your browser. Your method and answers are used on your own device and are never sent to a server, saved, or shared — close the tab and they're gone. It's general educational information based on published CDC guidance; it can't prescribe birth control or PrEP, diagnose anything, or replace a conversation with a clinician.