The most reliable way to avoid getting pregnant at a young age is to use effective contraception every time you have sex, or to not have sex at all. Abstinence is the only method that works 100% of the time, but if you are sexually active, several birth control options are highly effective, with the best ones preventing pregnancy more than 99% of the time. Understanding your options and how to use them correctly makes a real difference.
Why Some Methods Work Better Than Others
Birth control methods vary widely in how well they actually work. The key distinction is between “perfect use” and “typical use.” Perfect use means following every instruction exactly, every single time. Typical use reflects how real people use a method in everyday life, with occasional mistakes or missed steps. For young people especially, the gap between those two numbers matters a lot.
Condoms, for example, are 98% effective with perfect use but drop to about 82% effective with typical use. That means roughly 18 out of 100 people relying on condoms alone will get pregnant within a year. The birth control pill is over 99% effective when taken perfectly, but with typical use about 9 out of 100 people get pregnant in the first year. Missing a pill, taking it at inconsistent times, or not refilling a prescription on time all chip away at its effectiveness.
This is why doctors and major medical organizations recommend that young people consider methods that don’t depend on daily habits.
Long-Acting Methods: The Most Effective Option
IUDs and the birth control implant are called long-acting reversible contraception, or LARC. They have failure rates below 1%, making them the most effective reversible birth control available. Once placed, they work on their own for years without requiring you to remember anything daily or during sex.
The implant is a small rod inserted under the skin of the upper arm. It releases a low dose of hormone that prevents ovulation and lasts up to three years. IUDs are small devices placed inside the uterus. Hormonal IUDs release a synthetic form of progesterone, which thins the uterine lining and thickens cervical mucus to block sperm. They also tend to reduce heavy periods and menstrual cramps. Copper IUDs contain no hormones and instead use copper to create an environment that’s toxic to sperm, lasting up to ten years.
Both the American Academy of Pediatrics and the American College of Obstetricians and Gynecologists support LARC use for adolescents. The CDC classifies these methods as safe for nearly all young people, with very few medical exceptions. And once removed, your ability to get pregnant returns right away. There’s no long-term reduction in fertility.
One thing to know: younger people do have slightly higher rates of IUD expulsion (the device shifting out of place). In one large study, teens experienced expulsion rates of about 10.5% within the first year, compared to 5.7% for people over 20. Your provider will explain how to check that your IUD is still in place. Even with that higher rate, IUDs remain far more effective overall than pills or condoms.
Continuation rates tell a useful story too. About 85-86% of teens using an IUD or implant were still using it after a year, compared to under 40% of teens on the pill. A method only works if you keep using it.
The Pill and Other Hormonal Options
Combination birth control pills prevent pregnancy in three ways: they stop your ovaries from releasing an egg, they thicken the mucus at the cervix so sperm can’t get through, and they thin the uterine lining. When taken at the same time every day without missing doses, they’re over 99% effective. In real life, though, that 91% typical-use rate reflects how easy it is to slip up.
If you choose the pill, setting a daily alarm and keeping your pack somewhere visible can help. Other short-acting hormonal options like the patch (changed weekly) or the vaginal ring (changed monthly) work similarly and may be easier to stay consistent with, since they require less frequent attention than a daily pill.
Condoms: Protection Beyond Pregnancy
Condoms are the only method on this list that also protect against sexually transmitted infections. Even if you’re using another form of birth control, using condoms as well gives you dual protection. Here’s how to use an external condom correctly:
- Check the expiration date and open the wrapper carefully, avoiding teeth or scissors that could tear the condom.
- Place it on the tip of the erect penis with the rolled side facing out.
- Pinch the tip to leave a small gap at the top, then unroll it all the way to the base.
- After ejaculation, grip the rim of the condom and withdraw while the penis is still erect.
- Pull it off gently so nothing spills, then throw it away. Never reuse a condom.
If a condom breaks during sex, stop and replace it. Only use water-based lubricant with latex condoms. Oil-based products like petroleum jelly, lotion, or coconut oil weaken latex and can cause it to tear.
Methods That Are Not Reliable
The withdrawal method (pulling out before ejaculation) and rhythm-based methods (tracking your cycle to avoid sex on “fertile days”) are among the least effective ways to prevent pregnancy. Research shows that people using withdrawal or the rhythm method are significantly more likely to experience an unintended pregnancy compared to those using modern contraception.
Cycle tracking is especially unreliable for young people. In a large study published in the BMJ, ovulation occurred anywhere from day 8 to day 60 of the cycle. Only about 30% of women had their fertile window fall neatly within the textbook days 10 through 17. Between days 6 and 21, there was always at least a 10% chance of being in the fertile window on any given day. The researchers specifically noted that the timing is even less predictable for adolescents, whose cycles tend to be more irregular.
Sperm can survive inside the body for up to five days, so pregnancy can result from sex that happened nearly a week before ovulation. Relying on “safe days” when you’re young is essentially guessing.
Emergency Contraception as a Backup
If contraception fails or you have unprotected sex, emergency contraception can reduce your chances of pregnancy, but timing matters. The sooner you take it, the better it works.
The most widely available option contains a hormone called levonorgestrel (commonly known as Plan B). It’s sold over the counter without a prescription or age restriction. It works best within 72 hours of unprotected sex, though some evidence suggests it retains some effectiveness up to four or five days afterward. It works by delaying ovulation, so if ovulation has already happened, it won’t help.
A prescription-only option called ulipristal acetate (sold as ella) is more effective, particularly in the 48- to 120-hour window. In the first 24 hours after sex, it reduced the odds of pregnancy by about 65% more than levonorgestrel. It can also delay ovulation at a later point in the cycle than levonorgestrel can, giving it an advantage when time has passed.
Emergency contraception is a backup, not a regular method. It’s less effective than consistent use of any standard contraception and doesn’t protect against STIs.
Getting Birth Control When You’re Young
Accessing contraception as a minor varies by state. In many parts of the U.S., federally funded family planning clinics (known as Title X clinics) have historically provided confidential services to young people. However, legal challenges in some states have created uncertainty around whether minors can access these services without parental involvement. In Texas, for instance, a 2022 court ruling found that providing Title X services to minors without parental consent violated state law.
In most states, minors can still consent to their own reproductive healthcare, but the specifics depend on where you live. You can search for clinics near you through your state’s health department or organizations that list family planning providers by location. School-based health centers, community health centers, and some pharmacies are also options. If privacy is a concern, ask the clinic directly about their confidentiality policies before your visit.
Putting It All Together
The most effective strategy combines a reliable primary method with condoms. Using an IUD or implant for pregnancy prevention and condoms for STI protection covers both risks. If those aren’t accessible to you right now, the pill or other hormonal methods combined with condoms is the next best approach. Whatever you choose, using it consistently and correctly is what makes the difference between the “perfect use” number and the “typical use” number. The best birth control method is the one you’ll actually use, every time.