There is no single best birth control for everyone. The most effective methods are the ones you don’t have to think about: the hormonal implant and IUDs. The implant has a failure rate of just 0.05% per year, making it the most reliable reversible contraceptive available. But effectiveness isn’t the only thing that matters. The best method for you depends on whether you want hormones, how long you need protection, your health history, and what fits into your daily life.
How Methods Compare on Effectiveness
Birth control effectiveness is measured two ways: perfect use (following every instruction exactly) and typical use (how real people actually use it, with missed pills, late patches, and human error). The gap between these two numbers tells you how forgiving a method is. Here’s how the most common options stack up in the first year of typical use:
- Hormonal implant: 0.05% failure rate
- Hormonal IUD: 0.2% failure rate
- Copper IUD: 0.8% failure rate
- The pill, patch, or ring: 9% failure rate
- Male condom: 13 to 18% failure rate
- Internal (female) condom: 21% failure rate
- Sponge: up to 36% failure rate
The pill is 99.7% effective with perfect use, but in reality, about 9 out of 100 people using it will get pregnant in a year. That gap exists because people miss doses, take them at inconsistent times, or have interactions with other medications. The implant and IUDs don’t have that gap because once they’re placed, there’s nothing you need to do.
Long-Acting Methods: IUDs and the Implant
Long-acting reversible contraception, often called LARC, includes IUDs and the subdermal implant. These are the gold standard for pregnancy prevention because they remove human error from the equation. Once placed, they work continuously for years.
The hormonal implant is a small rod inserted under the skin of your upper arm. It’s FDA-approved for three years and is the single most effective reversible contraceptive. The hormonal IUD comes in several versions: some last up to seven or eight years, while smaller-dose versions last three to five years. Preliminary data from extended-use studies show high effectiveness and safety through eight years for the highest-dose hormonal IUD, with essentially zero pregnancies in year eight among hundreds of users tracked. The copper IUD contains no hormones at all and is approved for 10 years.
Getting an IUD placed involves a short office visit. The insertion can cause cramping and pain, though the intensity varies widely from person to person. Current CDC guidelines recommend that providers offer a local anesthetic (lidocaine, either injected near the cervix or applied topically) to reduce pain, and that pain management should be discussed before the procedure based on what you prefer. An older approach of using a cervical-softening medication beforehand is no longer recommended routinely, as evidence shows it doesn’t reduce pain and can actually increase cramping and diarrhea beforehand.
The Pill, Patch, and Ring
These are the most widely used hormonal methods and they all share similar effectiveness: about 91% in typical use. They require consistent action from you, whether that’s taking a pill daily, changing a patch weekly, or replacing a ring monthly.
Most pills contain two hormones (a combination pill), while some contain only a progestin. The distinction matters because combination methods carry specific health considerations. For people who smoke and are 35 or older, combination methods are generally not recommended. The same applies to anyone who experiences migraines with aura, where the CDC classifies combination methods as a category 4 risk, meaning they should not be used. Progestin-only options don’t carry the same restrictions.
A notable recent development is Opill, the first birth control pill available over the counter in the United States. It’s a progestin-only pill priced at about $20 for a one-month supply, with discounts for multi-month purchases. The manufacturer reports 98% effectiveness when taken at the same time every day. Because it’s available without a prescription, it removes a significant access barrier, though you still need the discipline of a daily habit for it to work well.
Blood Clot Risk With Hormonal Methods
One of the most common concerns about hormonal birth control is the risk of blood clots, known medically as venous thromboembolism. A large contemporary study published in the JAMA Network quantified this clearly. Among people not using any hormonal contraception, the rate is about 2 per 10,000 person-years. Combined pills raise that to about 10 per 10,000, and patches and vaginal rings carry a similar level of risk (around 8 per 10,000).
Progestin-only methods carry substantially lower risk. Progestin-only pills come in at 3.6 per 10,000, implants at 3.4, and hormonal IUDs at 2.1, which is essentially the same as using nothing at all. For context, pregnancy itself carries a much higher clot risk than any contraceptive. Still, if you have a personal or strong family history of blood clots, progestin-only or non-hormonal methods are the safer choice.
Non-Hormonal Options
If you want to avoid hormones entirely, your most effective option is the copper IUD. It works by creating an environment in the uterus that’s toxic to sperm, and it lasts up to 10 years. Its typical-use failure rate of 0.8% puts it in the same tier as hormonal LARC methods. The tradeoff is that it can make periods heavier and crampier, especially in the first few months.
Barrier methods like condoms, diaphragms, and sponges are also hormone-free but significantly less effective. Male condoms have a 13 to 18% typical-use failure rate, though they’re the only contraceptive that also protects against sexually transmitted infections. Other barrier methods like the sponge and diaphragm range from 14 to 27% failure rates in typical use. These can be reasonable options if pregnancy wouldn’t be a crisis, or if you combine them with another method.
Fertility After Stopping
A common worry is whether birth control will affect your ability to get pregnant later. A systematic review and meta-analysis found that fertility returns after stopping all methods, though the timeline varies. After removing an IUD, whether copper or hormonal, ovulation typically resumes within the first cycle or two. The type of IUD and how long it was in place don’t appear to affect how quickly fertility returns.
After stopping the pill, patch, or ring, most people ovulate again within one to three months, though hormonal methods can take a bit longer as the hormones clear from your system. The injectable (the shot given every three months) is the outlier. It can delay the return of fertility for several months longer than other methods, sometimes up to a year or more. If you’re planning to try to conceive in the near future, this is worth factoring into your choice.
Emergency Contraception as a Backup
Emergency contraception isn’t a primary method, but knowing your options matters for those times when your regular method fails. The most effective emergency option is the copper IUD, which can be placed up to five days after unprotected sex and then continues working as ongoing contraception.
Emergency contraceptive pills come in two types. The more widely available one (levonorgestrel, sold as Plan B and generics) works best when taken as soon as possible. There’s been debate about whether it’s less effective at higher body weights. Health Canada has noted it may be less effective in people over 165 pounds and ineffective over 176 pounds, but other regulatory agencies have concluded the data isn’t strong enough to discourage anyone from using it based on weight alone. A second type of emergency pill (ulipristal acetate, sold as Ella) appears to be more effective for people with a BMI over 30, with an unintended pregnancy rate of about 2.5% compared to roughly 6% with levonorgestrel in that group.
Choosing What Works for You
If preventing pregnancy is your top priority and you don’t want to think about it daily, the implant or a hormonal IUD is the strongest option. If you want something hormone-free with similar set-it-and-forget-it reliability, the copper IUD is your best bet. If you value flexibility and don’t mind a daily routine, the pill (now available over the counter) keeps you in control of starting and stopping easily.
Your health history narrows the field. Smokers over 35, people with a history of blood clots, and those who get migraines with aura should avoid combination methods containing estrogen. For everyone else, the choice comes down to how you want contraception to fit into your life: how long you want protection, how you feel about hormones, whether you want a procedure involved, and how much failure risk you’re comfortable with. The numbers above give you a concrete way to weigh those tradeoffs rather than relying on guesswork.