Reviewed by the RHC Health Desk. Last verified: August 21, 2026.
Medical Disclaimer: This page is for general education only. It is not medical advice, diagnosis, or treatment, and reading it does not create a provider-patient relationship. Contraceptive choice depends on your health history, and it should be made with a licensed healthcare provider. If you are having a medical emergency, call 911 or go to the nearest emergency room. See our full Medical Disclaimer.
There is no single “best” method of birth control — the right choice depends on your health history, how much you want a method to depend on daily action versus none at all, whether STI protection matters for your situation, and how quickly you’d want fertility to return if you stopped. This page walks through the broad categories so you have a framework before comparing specific options in more depth.
Perfect Use vs. Typical Use
Contraceptive effectiveness is usually reported two ways. “Perfect use” reflects a method used exactly as directed, every time. “Typical use” reflects how people actually use it in real life, including occasional missed doses or inconsistent use. The gap between the two numbers tends to be small for methods that don’t depend on remembering something daily or per act of intercourse, and much larger for methods that do. According to CDC-compiled contraceptive effectiveness data, long-acting methods like intrauterine devices and implants have typical-use failure rates under 1% in the first year, while methods that require more consistent user action — pills, patches, rings, condoms — see a bigger difference between their perfect-use and typical-use numbers.
Broad Method Categories
- Long-acting reversible contraception (LARC): Hormonal or copper intrauterine devices and hormonal implants. These don’t require daily or per-use action once placed, which is why their typical-use effectiveness closely matches their perfect-use effectiveness.
- Short-acting hormonal methods: Pills, the patch, the vaginal ring, and injectable methods. These are effective when used consistently, but effectiveness in typical use is lower than perfect use because they depend on remembering a schedule.
- Barrier methods: Condoms, diaphragms, and similar devices. These are the only category that also reduces STI transmission risk (specifically external and internal condoms) — a factor that isn’t captured by pregnancy-prevention effectiveness numbers alone.
- Fertility awareness-based methods: Tracking cycle signs to identify and avoid the fertile window. Effectiveness varies widely depending on which specific method is used and how consistently.
- Permanent methods: Sterilization procedures for either partner, intended to be non-reversible.
STI Protection Is a Separate Question From Pregnancy Prevention
This is worth saying plainly: hormonal methods, IUDs, and fertility awareness-based methods do not protect against sexually transmitted infections. External and internal condoms are currently the only widely available contraceptive methods that reduce STI transmission risk. Many people use condoms alongside another method specifically to cover both goals at once. See our STI & Sexual Health guide for screening guidance.
Emergency Contraception: A Separate Category
Emergency contraception (EC) is used after unprotected intercourse or contraceptive failure, not as a routine ongoing method. Options generally include levonorgestrel-based pills, ulipristal acetate pills (available by prescription), and insertion of a copper IUD. Timing matters: EC pills are most effective the sooner they’re taken after unprotected intercourse, and effectiveness declines the longer you wait. A copper IUD, if it’s an option for you, is the most effective form of EC and can be inserted within a short window after intercourse, but that window is time-limited, so acting promptly matters.
It’s worth being clear about what emergency contraception is not: it is not the same thing as medication used to end an existing pregnancy, and it does not work if a pregnancy has already implanted. It’s a pregnancy-prevention method used shortly after intercourse, not a pregnancy-ending one. See our dedicated guide on emergency contraception timing and access for a fuller breakdown.
Related Reading on Reproductive Health Ctr
- Menstrual Cycles & Ovulation — how hormonal methods can change bleeding patterns.
- STI & Sexual Health — screening guidance, since contraception and STI prevention are separate concerns.
- Pregnancy & Preconception — what to know when you’re ready to stop using contraception and try to conceive.
- Reproductive Health & Preventive Care — how contraceptive counseling fits into routine visits.
We’re also building a full method-by-method comparison guide and a dedicated emergency contraception guide covering timing, access, and what happens after taking it. Check back for those, or explore the pillar pages above.
This page was last reviewed for accuracy on August 21, 2026, using publicly available clinical guidance. Reproductive Health Ctr is an independent educational publication and does not provide medical diagnosis or treatment.