By Choosing a contraceptive method is one of the most personal health decisions a person can make — and one of the most frequently made with incomplete information.
Most people learn about contraception in a rushed high school health class that covers maybe two or three methods, emphasizes abstinence, and leaves out most of the nuance that would actually help someone make an informed choice as an adult. Then they spend the next decade or two making decisions based on what a friend recommended, what their doctor happened to prescribe without much discussion, or what they’d heard was easiest.
The result is a significant mismatch between what people use and what would actually work best for their life. In the United States, nearly half of all pregnancies — approximately 2.8 million each year — are unintended (Finer and Zolna, 2016). That number is not a reflection of carelessness. It reflects a knowledge gap.
This guide covers every major contraceptive method available in the United States — how each one works, how effective it actually is, what the side effects and considerations are, and who it tends to work best for. The goal is to give you enough real information to have a genuinely informed conversation with your healthcare provider.
This article is part of our Sexual Health series. For the full foundation, visit our Sexual Health Explained guide.
Understanding Effectiveness: Perfect Use vs Typical Use
Before getting into specific methods, there is one concept that completely changes how you interpret contraceptive effectiveness data — and most people have never had it properly explained.
Every contraceptive method has two effectiveness rates: perfect use and typical use.
Perfect use refers to how effective the method is when used correctly and consistently every single time. This is the number most commonly advertised.
Typical use refers to how effective the method is in real-world conditions — accounting for human error, inconsistent use, forgetting, and incorrect technique. This is the number that actually predicts your personal risk.
The gap between these two numbers is enormous for some methods and negligible for others.
| Method | Perfect use failure rate | Typical use failure rate |
|---|---|---|
| Male condom | 2% | 13% |
| Female condom | 5% | 21% |
| Combined oral contraceptive pill | 0.3% | 7% |
| Progestin-only pill (mini-pill) | 0.3% | 7% |
| Contraceptive patch | 0.3% | 7% |
| Vaginal ring (NuvaRing) | 0.3% | 7% |
| Injectable (Depo-Provera) | 0.2% | 4% |
| Hormonal IUD (Mirena, Kyleena, etc.) | 0.1–0.2% | 0.1–0.2% |
| Copper IUD (Paragard) | 0.8% | 0.8% |
| Implant (Nexplanon) | 0.05% | 0.05% |
| Tubal ligation | 0.5% | 0.5% |
| Vasectomy | 0.10% | 0.15% |
| Fertility awareness methods | 0.4–5% | 2–23% |
| Emergency contraception (Plan B) | N/A | 75–89% effective within 72 hours |
The methods with the smallest gap between perfect and typical use are the ones that don’t require consistent user action — IUDs, implants, and sterilization. These are called long-acting reversible contraceptives, or LARCs, and their real-world effectiveness is essentially identical to their perfect-use effectiveness because there is nothing the user can do wrong on a day-to-day basis.
“The gap between perfect use and typical use is where most unintended pregnancies happen. A method that is 99% effective with perfect use can be only 93% effective in real life — and that difference adds up significantly over time.”
Hormonal Contraceptives
Hormonal contraceptives work by using synthetic versions of estrogen and/or progestin to prevent pregnancy through one or more mechanisms — typically suppressing ovulation, thickening cervical mucus to prevent sperm from reaching an egg, and thinning the uterine lining.
The Combined Oral Contraceptive Pill
The pill is the most commonly used prescription contraceptive in the United States. It contains both synthetic estrogen and progestin and is taken daily — ideally at the same time each day.
How it works:
- Primarily suppresses ovulation
- Thickens cervical mucus
- Thins the uterine lining
Benefits beyond contraception:
- Regulates and lightens periods
- Reduces menstrual cramps
- Improves acne in many people
- Reduces risk of ovarian cysts
- Associated with reduced risk of ovarian and endometrial cancer with long-term use
- Can reduce PCOS symptoms
Considerations:
- Requires daily adherence — missed pills significantly reduce effectiveness
- Can cause nausea, breast tenderness, headaches, and mood changes in some people, particularly in the first few months
- Small increased risk of blood clots — particularly relevant for smokers over 35, people with migraines with aura, and those with certain clotting disorders
- Does not protect against STIs
- Some medications reduce its effectiveness — including certain antibiotics, anticonvulsants, and St. John’s Wort
Who it tends to work well for: People who are good at daily routines, want period regulation benefits, and have no contraindications to estrogen-containing methods.
The Progestin-Only Pill (Mini-Pill)
The mini-pill contains only progestin and is a good option for people who cannot take estrogen — including breastfeeding individuals, smokers over 35, and those with a history of blood clots or migraines with aura.
Key difference from the combined pill: It must be taken within the same three-hour window every day. Missing this window significantly reduces effectiveness and requires backup contraception.
The Contraceptive Patch
A small adhesive patch worn on the skin — typically the abdomen, upper arm, or buttocks — replaced weekly for three weeks, followed by a patch-free week. It delivers estrogen and progestin through the skin.
Benefits: Weekly rather than daily action required. Same non-contraceptive benefits as the combined pill.
Considerations: Skin irritation at the patch site. The same medical contraindications as the combined pill. May be less effective in people over 198 pounds.
The Vaginal Ring (NuvaRing, Annovera)
A flexible ring inserted into the vagina that releases estrogen and progestin locally. NuvaRing is worn for three weeks and removed for one. Annovera is a newer option worn for one year with monthly removal for seven days.
Benefits: Monthly (or annual) action rather than daily. Lower hormone dose than the pill because hormones are absorbed locally. Same non-contraceptive benefits.
Considerations: Some people are uncomfortable with vaginal insertion and removal. Occasional vaginal irritation or discharge changes. Same medical contraindications as the combined pill.
The Injectable (Depo-Provera)
A progestin injection given every three months by a healthcare provider. One of the most effective user-dependent methods available.
Benefits:
- Three months of protection per injection
- Periods often become lighter or stop entirely
- Good option for people who find daily pills difficult to maintain
- Can be used while breastfeeding
Considerations:
- Requires a clinic visit every twelve weeks
- Return to fertility after stopping can be delayed by six to eighteen months — important for people planning to conceive in the near future
- Associated with reduced bone density with long-term use — reversible after stopping but worth discussing with your provider
- Irregular spotting and bleeding, particularly in the first few months
- Cannot be “stopped” once injected if side effects occur
Hormonal IUDs (Mirena, Kyleena, Liletta, Skyla)
A small T-shaped device inserted into the uterus by a healthcare provider, releasing a low dose of progestin locally. Different brands vary in size, hormone dose, and duration of effectiveness.
- Mirena — effective for up to 8 years; highest progestin dose; periods often stop
- Kyleena — effective for up to 5 years; lower hormone dose; smaller device
- Liletta — effective for up to 8 years; similar to Mirena
- Skyla — effective for up to 3 years; smallest device; designed for people who haven’t given birth
Benefits:
- Set-and-forget for years
- Real-world effectiveness essentially identical to perfect use
- Periods typically become lighter or stop entirely with higher-dose options
- Immediately reversible — fertility returns quickly after removal
- Low systemic hormone exposure because most of the effect is local
Considerations:
- Insertion can be uncomfortable to painful, particularly for people who haven’t given birth
- Cramping and irregular spotting in the first few months after insertion
- Small risk of expulsion (the IUD moving out of position)
- Rare risk of uterine perforation during insertion
- Does not protect against STIs
Non-Hormonal Contraceptives
The Copper IUD (Paragard)
The only non-hormonal long-acting reversible contraceptive available in the US. A copper IUD is inserted into the uterus and can remain effective for up to ten to twelve years — or used as emergency contraception if inserted within five days of unprotected sex, making it the most effective emergency contraceptive option available.
How it works: Copper ions are toxic to sperm, impairing their motility and ability to fertilize an egg. It also affects the uterine environment in ways that prevent implantation.
Benefits:
- Highly effective with no hormones
- Immediately reversible
- Periods continue naturally
- Can be used as emergency contraception
- Good option for people who cannot or prefer not to use hormonal methods
Considerations:
- Periods may become heavier and more crampy, particularly in the first few months
- Insertion discomfort similar to hormonal IUDs
- Does not protect against STIs
The Implant (Nexplanon)
A small, flexible rod about the size of a matchstick inserted under the skin of the upper arm by a healthcare provider. It releases progestin continuously and is effective for up to three years.
Why it stands out: The implant has the lowest typical use failure rate of any reversible contraceptive — 0.05 percent. Because it requires nothing from the user after insertion, perfect and typical use are essentially the same.
Benefits:
- Most effective reversible contraceptive available
- Immediately reversible
- Periods often become lighter or stop
- Can be used while breastfeeding
Considerations:
- Irregular spotting and unpredictable bleeding patterns, particularly in the first year
- Insertion and removal require a healthcare provider
- Arm bruising at insertion site
- Does not protect against STIs
Barrier Methods
Barrier methods physically prevent sperm from reaching the egg. They are the only contraceptive methods that also reduce STI transmission risk.
Male condoms:
- When used correctly and consistently, approximately 87 percent effective in typical use
- The only method that significantly reduces STI transmission
- Widely available without a prescription
- Latex-free options available for those with latex allergies
Female condoms (internal condoms):
- Inserted into the vagina before sex
- 79 percent effective in typical use
- Also reduce STI transmission
- Can be inserted up to eight hours before sex
Diaphragm and cervical cap:
- Inserted into the vagina before sex to cover the cervix
- Must be used with spermicide
- Require fitting by a healthcare provider
- Less effective than hormonal methods — 83 to 88 percent in typical use
- The Caya diaphragm is a one-size-fits-most option available by prescription in the US
Spermicide alone:
- Significantly less effective than other methods — approximately 72 percent in typical use
- Best used in combination with barrier methods rather than alone
Fertility Awareness Methods (FAMs)
Fertility awareness methods involve tracking menstrual cycles, basal body temperature, cervical mucus changes, or a combination of these to identify fertile and non-fertile days. Sex is avoided or a barrier method is used on fertile days.
Methods include:
- Calendar/rhythm method — tracking cycle length
- Basal body temperature method — tracking temperature shifts at ovulation
- Cervical mucus method (Billings method)
- Symptothermal method — combining temperature and mucus tracking
- Technology-assisted methods — apps and devices including Natural Cycles (FDA-cleared)
Typical use effectiveness ranges widely — from around 76 to 88 percent — depending on the method and how consistently and correctly it’s applied. Perfect use effectiveness is higher but requires significant training, commitment, and regular cycles.
“Fertility awareness methods can be highly effective for motivated, well-trained users with regular cycles. For most people, the gap between perfect and typical use is significant — which is why they work best when combined with barrier methods on fertile days rather than abstinence alone.”
Permanent Contraception
Tubal Ligation
A surgical procedure in which the fallopian tubes are cut, tied, or blocked, preventing eggs from reaching the uterus. It is considered permanent and should only be chosen by people who are certain they do not want future pregnancies.
- Highly effective — failure rate of approximately 0.5 percent over ten years
- Can be performed laparoscopically as an outpatient procedure
- Does not affect hormone levels or menstrual cycles
- Reversal is possible but not reliable — should not be considered reversible
Vasectomy
A minor surgical procedure in which the vas deferens — the tubes that carry sperm — are cut or blocked. It is the most effective surgical contraception option with a typical use failure rate of 0.15 percent.
- Simpler, safer, and less expensive than tubal ligation
- Performed under local anesthesia as an outpatient procedure
- Does not affect sexual function or hormone levels
- Requires a follow-up semen analysis to confirm effectiveness
- Reversal is possible but success rates decline significantly with time
Emergency Contraception
Emergency contraception is used after unprotected sex or contraceptive failure to reduce the risk of pregnancy. It is not an abortion — it prevents fertilization or implantation.
Levonorgestrel pills (Plan B, Take Action, others):
- Available over the counter at pharmacies without a prescription
- Most effective within 72 hours of unprotected sex — approximately 75 to 89 percent effective
- Effectiveness declines significantly after 72 hours
- Less effective for people over 165 to 175 pounds
- May cause nausea, irregular bleeding
Ella (ulipristal acetate):
- Prescription required in the US
- Effective up to five days after unprotected sex
- More effective than levonorgestrel at days four and five
- More effective for people with higher body weight
Copper IUD:
- Most effective emergency contraception — over 99 percent effective
- Must be inserted by a provider within five days of unprotected sex
- Provides ongoing contraception for up to ten to twelve years after insertion
Choosing the Right Method: Key Questions to Consider
The best contraceptive method is the one that fits your life — not the one with the highest theoretical effectiveness on a chart. Here are the questions worth thinking through before your appointment.
- How important is it to me to avoid pregnancy right now? If avoiding pregnancy is critical, the most effective methods — IUDs, implant, sterilization — are worth prioritizing regardless of other factors.
- How do I feel about hormones? If you prefer to avoid hormonal methods, the copper IUD is the most effective non-hormonal option. Barrier methods and FAMs are alternatives with lower effectiveness.
- Do I need STI protection? If yes, condoms are the only contraceptive method that provides meaningful STI protection. They can be combined with any other method.
- How good am I at daily routines? If daily adherence is challenging, user-independent methods — IUDs, implant — are significantly more reliable in practice than methods requiring daily or per-act action.
- Do I want to maintain my natural cycle? If period regulation or natural cycling is important to you, FAMs, the copper IUD, or barrier methods preserve your natural hormonal cycle.
- Am I planning to conceive in the near future? Most methods have near-immediate return of fertility. The exception is the injectable (Depo-Provera), which can delay fertility return for up to eighteen months.
Frequently Asked Questions
Q: Does the pill cause infertility?
No. Fertility typically returns within one to three months of stopping the pill, sometimes sooner. There is no evidence that oral contraceptive use affects long-term fertility. The slight delay some people notice before their cycle fully regularizes after stopping is normal and temporary.
Q: Can I use an IUD if I’ve never been pregnant?
Yes. IUDs are safe and appropriate for people regardless of whether they have been pregnant. Smaller IUD options including Kyleena and Skyla are specifically designed with nulliparous users in mind. Insertion may be more uncomfortable for people who haven’t given birth, but it is not contraindicated.
Q: Does hormonal contraception cause depression?
This is one of the most discussed questions in contraceptive research. Some studies have found associations between hormonal contraception and depression risk, particularly in adolescents and with certain progestin-only methods. Other studies have not found significant effects. The evidence is not conclusive, and individual responses vary significantly. If you notice mood changes after starting a hormonal contraceptive, discuss it with your provider — switching formulations or methods can make a meaningful difference.
Q: Is the morning-after pill the same as the abortion pill?
No. Emergency contraception — including Plan B — prevents pregnancy by delaying or preventing ovulation, or by preventing fertilization. It does not terminate an established pregnancy. The abortion pill (mifepristone and misoprostol) is a completely separate medication used to end an existing pregnancy.
Q: Are contraceptives covered by insurance in the US?
Under the Affordable Care Act, most insurance plans are required to cover FDA-approved contraceptive methods without cost-sharing — meaning no copay or deductible. This includes pills, patches, rings, IUDs, implants, sterilization, and barrier methods. Coverage varies by plan type and there are exemptions for some employers based on religious or moral grounds. Planned Parenthood and community health centers offer contraception on a sliding scale for people without adequate coverage.
This article is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional for personal health concerns.
References
Finer LB, Zolna MR. Declines in unintended pregnancy in the United States, 2008–2011. N Engl J Med. 2016;374(9):843–852. https://pubmed.ncbi.nlm.nih.gov/26962904
Trussell J. Contraceptive failure in the United States. Contraception. 2011;83(5):397–404. https://pubmed.ncbi.nlm.nih.gov/21477680
Centers for Disease Control and Prevention (CDC). Contraception. 2023. https://www.cdc.gov/reproductivehealth/contraception/index.htm
American College of Obstetricians and Gynecologists (ACOG). Long-Acting Reversible Contraception: Implants and Intrauterine Devices. 2017. https://www.acog.org/clinical/clinical-guidance/practice-bulletin/articles/2017/11/long-acting-reversible-contraception-implants-and-intrauterine-devices
Daniels K, Abma JC. Current Contraceptive Status Among Women Aged 15–49: United States, 2017–2019. NCHS Data Brief. 2020;388. https://pubmed.ncbi.nlm.nih.gov/33395388
Planned Parenthood. Birth Control. 2023. https://www.plannedparenthood.org/learn/birth-control
American College of Obstetricians and Gynecologists (ACOG). Emergency Contraception. 2019. https://www.acog.org/clinical/clinical-guidance/practice-bulletin/articles/2015/09/emergency-contraception
