Choosing birth control comes down to a few practical questions: how well a method prevents pregnancy in real life, how much day-to-day effort it takes, whether it fits your health and lifestyle, and whether you also need protection from sexually transmitted infections (STIs). This guide compares the main options so you can have an informed conversation with a healthcare provider.
How effectiveness is measured
You'll see two numbers for every method:
- Perfect use — how well it works when used exactly as directed, every single time.
- Typical use — how well it works in real life, accounting for human error.
For methods you have to act on regularly — taking a daily pill, using a condom each time — the gap between these two numbers is wide. For "set and forget" methods like the IUD and implant, the two numbers are almost identical, because there's nothing to forget. According to the CDC, this is the single biggest driver of real-world effectiveness.
The main categories
Long-acting reversible contraception (LARC)
This group includes the intrauterine device (IUD) — hormonal or copper — and the contraceptive implant, a small rod placed under the skin of the upper arm. Both are more than 99% effective, last for years, and are fully reversible. Because they don't rely on daily action, typical use and perfect use are essentially the same.
Hormonal methods you use regularly
The combined pill, progestogen-only pill, patch, vaginal ring, and injection all use hormones to prevent ovulation or otherwise block pregnancy. Used perfectly they are very effective (over 99%), but typical-use effectiveness is closer to 91–94% because doses can be missed or delayed.
Barrier methods
External (male) and internal (female) condoms physically block sperm. Condoms are the only method that also reduces STI risk, which is why they're often combined with another method. Typical-use effectiveness for pregnancy is around 79–87%, so consistent, correct use matters a lot.
Fertility awareness and other methods
Fertility-awareness-based methods track the menstrual cycle to identify fertile days. They can work for motivated, well-trained users but have a wider range of effectiveness and require consistent daily tracking.
Permanent methods
Sterilization (tubal procedures or vasectomy) is highly effective and intended to be permanent. It's an option for people who are sure they don't want future pregnancies.
How to choose
There's no single "best" method — only the best method for you right now. Useful questions to bring to a provider:
- How important is the highest possible effectiveness?
- Do I want something I don't have to think about daily?
- Do I also need STI protection?
- Are there health conditions or medications that rule out certain hormones?
- Do I want my fertility to return quickly when I stop?
The bottom line
Effectiveness, effort, health fit, and STI protection are the four levers. LARCs lead on effectiveness and convenience; condoms are essential when STI protection matters; and the "best" choice is the one you'll use consistently and comfortably. A provider can help you weigh the trade-offs for your situation.
