Preventing pregnancy during sex comes down to choosing a method that fits your life and using it consistently. Your options range from over 99% effective (implants and IUDs) to around 80% effective (withdrawal), so the method you pick matters enormously. Here’s what actually works, how well each option performs in real life, and how to layer methods for the best protection.
Why “Typical Use” Is the Number That Matters
Every contraceptive method has two effectiveness ratings: perfect use and typical use. Perfect use means you follow every instruction flawlessly, every single time. Typical use reflects how real people actually behave, including missed pills, late injections, and condoms put on incorrectly. Typical use is the number you should pay attention to, because it predicts what’s likely to happen in your actual life.
Without any contraception at all, about 85 out of 100 people having regular sex will become pregnant within a year. Every method on this list dramatically improves those odds, but some do it far more reliably than others.
Long-Acting Methods: Set It and Forget It
If your top priority is not getting pregnant, long-acting reversible methods are the most effective option available. They require no daily effort, no remembering, and no action in the moment. Once they’re in place, they work on their own.
The implant is a tiny rod placed under the skin of your upper arm during a quick office visit. It’s the single most effective reversible contraceptive, with a pregnancy rate of just 0.05% per year. That means fewer than 1 in 2,000 people using it will become pregnant. It works by releasing a low, steady dose of a hormone that stops your ovaries from releasing eggs and thickens the mucus at the entrance to your uterus so sperm can’t easily get through.
The hormonal IUD is a small device placed inside the uterus. It has a typical-use failure rate of about 0.2% per year. It works primarily by thickening cervical mucus rather than stopping ovulation, which is why some people experience lighter periods or no periods at all while using it.
The copper IUD contains no hormones at all. Instead, the copper creates an environment inside the uterus that’s toxic to sperm. It’s FDA-approved for up to 10 continuous years of use and has a first-year failure rate of 0.8%. Over a full decade, its effectiveness is comparable to surgical sterilization. If you want highly effective, long-term contraception without hormones, this is the option designed for that.
All three of these methods are fully reversible. Fertility typically returns quickly after removal.
Hormonal Methods You Manage Yourself
The pill, patch, and vaginal ring all have similar effectiveness: about 91% with typical use, meaning 9 out of 100 people using them will become pregnant within a year. With perfect use, they’re 99.7% effective. The gap between those two numbers reflects how easy it is to miss a pill, apply a patch late, or forget to replace a ring on schedule.
The pill requires daily attention. If you’re using a progestin-only pill (one version is now available over the counter in the U.S. without a prescription), the timing window is especially tight. Missing your dose by more than 3 hours means you need a backup method like condoms until you’re back on track. Combined pills that contain both estrogen and progestin offer a slightly wider margin for error, but consistency still matters.
The injection is given every three months and has a typical-use failure rate of about 6%. It’s more effective than the pill in practice because there’s less room for user error. You only need to remember four appointments a year instead of 365 pills.
Condoms and Other Barrier Methods
External condoms (the kind worn on the penis) are 98% effective when used correctly every time. In real life, they’re closer to 82% effective, with about 18 out of 100 people becoming pregnant within a year of relying on them alone. The difference comes from inconsistent use, putting them on too late, or breakage. Using a condom from start to finish, checking the expiration date, and leaving space at the tip all improve reliability.
Internal condoms (worn inside the vagina) are slightly less effective: about 79% with typical use, 95% with perfect use. Diaphragms sit in a similar range at 88% typical effectiveness.
The big advantage of condoms over every other method on this list is that they’re the only contraceptive that also reduces the risk of sexually transmitted infections. If STI prevention matters to you (and for most people it should), condoms play a role that hormonal methods simply can’t fill.
Combining Methods for Better Protection
You don’t have to choose just one approach. Using a condom alongside a hormonal method or IUD gives you what’s called dual protection: strong pregnancy prevention plus STI risk reduction. Public health organizations recommend condoms plus a long-acting method as the most effective dual-protection strategy available.
This combination is especially practical early in relationships, when STI status may be unknown, or anytime you want an extra layer of security against pregnancy. The math works in your favor. If one method has a 9% failure rate and the other has an 18% failure rate, using both together drops the combined risk well below either one alone.
The Withdrawal Method: Better Than Nothing, Worse Than Most
Pulling out before ejaculation prevents pregnancy about 80% of the time with typical use, meaning roughly 1 in 5 people relying on it will become pregnant within a year. With perfect use (pulling out completely, every single time, well before ejaculation), the failure rate drops to 4%.
The challenge is that perfect use is genuinely difficult to achieve consistently. Pre-ejaculate fluid, released before orgasm, can contain sperm. It carries less sperm than semen, but enough to cause pregnancy if it enters the body. Withdrawal requires significant self-control and trust, and even couples who are highly motivated don’t always time it correctly. It’s a reasonable backup in the moment if you have nothing else, but it’s a risky choice as a primary strategy.
Fertility Awareness: Tracking Your Fertile Window
Fertility awareness methods involve tracking your menstrual cycle to identify the days when pregnancy is possible and avoiding unprotected sex on those days. Sperm can survive inside the reproductive tract for up to 5 days, and the egg is viable for about a day after ovulation, creating a fertile window of roughly 6 days per cycle.
With typical use, about 24 out of 100 people using fertility awareness methods become pregnant within a year. That’s a high failure rate, driven by the difficulty of accurately predicting ovulation (especially if your cycles aren’t perfectly regular) and the discipline required to abstain or use barriers during the fertile window every single month. These methods work best for people who are willing to invest time in daily tracking and who would be okay with an unplanned pregnancy.
Emergency Contraception as a Backup
Emergency contraception is not a primary method, but knowing about it matters. If a condom breaks, you forget a pill, or you have unprotected sex for any reason, emergency contraceptive pills can reduce the chance of pregnancy if taken within 5 days. The sooner you take them, the better they work.
Two types are widely available. One version is sold over the counter at pharmacies without a prescription or age restriction. A second type, available by prescription, is more effective during the 3-to-5-day window after unprotected sex. Within the first 3 days, both work similarly. A copper IUD can also be inserted as emergency contraception within 5 days and is the most effective emergency option, with the added benefit of providing up to 10 years of ongoing contraception afterward.
Permanent Options
If you’re certain you don’t want children (or more children), sterilization is over 99% effective for both vasectomy and tubal ligation. Vasectomy is the simpler procedure: it’s done under local anesthesia, involves no incision into the abdomen, and has a shorter recovery time. Tubal ligation requires a small abdominal incision and is considered minor surgery, but it’s still more involved than a vasectomy. Both are intended to be permanent, so they’re best suited for people who are confident in the decision.
Choosing What Works for Your Life
The best method is the one you’ll actually use correctly and consistently. A condom used every time outperforms a pill forgotten three times a month. An IUD you never think about outperforms both. Consider how much effort you’re realistically willing to put in, whether you want hormonal or non-hormonal options, how long you need contraception, and whether STI protection matters.
For the highest pregnancy prevention with the least daily effort, implants and IUDs are in a category of their own. For people who want control over starting and stopping, pills and condoms offer flexibility at the cost of requiring more attention. Layering a barrier method with a hormonal or long-acting method gives you the broadest protection against both pregnancy and infection.