Types of Birth Control and Contraception
Compare birth control methods, effectiveness rates, hormonal vs non-hormonal options, and emergency contraception.
Contraception helps prevent pregnancy, but methods differ in how they work, how often they require action, side effects, medical suitability and how quickly fertility returns after stopping. The most appropriate method is the one that is both medically suitable and realistic for the person to use.
All guides in Contraception
2 guides • reference-basedTypes of Birth Control: How to Compare Contraception Options
The best contraceptive method is not the same for everyone. Methods differ in effectiveness, how often you need to remember them, side effects, bleeding changes, hormones, reversibility, access and medical suitability. Most do not prevent STIs.
Read the guideUnderstanding contraception
Choosing contraception works better as a values-and-priorities decision than a ranking exercise. Some adults want the highest possible pregnancy prevention with almost no daily effort. Others prioritise avoiding hormones, controlling the method themselves, lighter periods, privacy or rapid reversibility. A good contraception service should help someone weigh those priorities without pressuring them toward one method.
Most contraception does not protect against sexually transmitted infections. Condoms are important because they can reduce both pregnancy and many STI risks. People may use condoms alone or combine them with a more effective pregnancy-prevention method when both outcomes matter.
Long-acting reversible contraception
Implants and intrauterine devices or systems work for years once placed and are among the most effective reversible methods because they do not depend on daily action. They require a trained clinician for insertion and removal.
Long-acting reversible contraception, often called LARC, includes intrauterine devices and the contraceptive implant. These methods are among the most effective reversible birth control options because they keep working without requiring a daily, weekly, or per-sex action. Hormonal IUDs release progestin inside the uterus, while the copper IUD is a hormone-free contraception option. The implant releases progestin from a small rod placed under the skin of the upper arm.
Bleeding changes differ between LARC methods and can matter as much as effectiveness when comparing types of birth control. Hormonal IUDs often make periods lighter over time, while a copper IUD may initially make bleeding or cramps heavier. Unpredictable bleeding is common with the implant. IUDs and implants can be removed when contraception is no longer wanted, and fertility generally returns quickly after removal. They do not protect against sexually transmitted infections, so condoms may still be useful.
Pills, patches and rings
These hormonal methods require regular user action. Combined methods contain oestrogen plus progestogen and are not suitable for everyone; progestogen-only options have different eligibility and use instructions.
Birth control pills, patches, and vaginal rings prevent pregnancy with hormones, but the amount of attention they require differs. Most pills are taken every day, patches are changed on a schedule, and rings are replaced according to the specific product. Combined hormonal versions contain estrogen and progestin, while some pills contain progestin only. These differences can affect bleeding patterns, convenience, side effects, and whether a method is medically suitable.
Estrogen-containing birth control is not appropriate for everyone, including some people with certain blood-clot risks, cardiovascular conditions, or migraine with aura. Progestin-only options can be appropriate in situations where estrogen is not recommended, although consistent use remains important. When comparing the pill vs patch vs ring, it can help to consider how easily the schedule fits daily life rather than judging effectiveness under ideal use alone. None of these methods provides STI protection.
Injection
The contraceptive injection provides protection for a defined period and requires repeat administration. Bleeding changes can occur, and return to fertility can take longer after stopping than with some other methods.
The birth control injection is a progestin-only contraception method given on a repeating schedule, usually about every three months. Because there is no pill to remember each day, it may suit people who want a private, relatively low-maintenance method without an implant or IUD. Its effectiveness in everyday use depends on receiving repeat injections on time.
Irregular bleeding is common, especially early in use, and some people eventually have very light periods or no periods. The injection can temporarily reduce bone mineral density during use, with recovery occurring after it is stopped in many people. Unlike most reversible contraception methods, fertility may take a number of months to return after the last injection, so that delay can be relevant for someone comparing birth control options with near-term pregnancy plans. It does not prevent STIs.
Barrier methods
External and internal condoms create a physical barrier. Diaphragms or caps are used with spermicide in some settings. Barrier methods are more user-dependent and generally have higher typical-use pregnancy rates than long-acting methods.
Barrier birth control methods physically reduce the chance that sperm will reach an egg. They include external condoms, internal condoms, diaphragms, cervical caps, contraceptive sponges, and spermicide. Their main advantage is user control: they can be used only when needed and generally do not affect natural hormone levels. Effectiveness depends heavily on using the method correctly every time.
Condoms are different from most other contraception methods because latex and appropriate synthetic condoms can also reduce transmission of many STIs, including HIV. They provide less complete protection against infections spread through skin-to-skin contact outside the covered area. Animal-membrane condoms can help prevent pregnancy but should not be relied on for STI prevention. Diaphragms, caps, sponges, and spermicide are pregnancy-prevention methods rather than STI barriers.
Fertility-awareness methods
These methods use cycle signs and timing to identify fertile days. They require detailed learning, consistent tracking and a plan to avoid unprotected vaginal sex on fertile days. Effectiveness varies by method and use.
Fertility awareness methods estimate the fertile part of the menstrual cycle by tracking information such as cycle dates, cervical mucus, and body temperature. Depending on the method, people avoid penis-in-vagina sex or use another contraception method during days when pregnancy is more likely. Effective fertility awareness usually involves learning a defined method rather than relying only on a calendar prediction from an app.
Ovulation does not always occur on the same cycle day, and sperm can remain capable of fertilization for several days, which is why a broader fertile window is considered. Irregular cycles, recent childbirth, breastfeeding, perimenopause, illness, travel, and other factors can make fertility signs harder to interpret. Fertility awareness methods do not protect against STIs, and they require more ongoing participation than an IUD, implant, or other low-maintenance birth control option.
Permanent contraception
Vasectomy and procedures that block or remove fallopian-tube pathways are intended to be permanent. People should understand procedure risks, confirmation requirements and the possibility that reversal may be difficult, expensive or unsuccessful.
Permanent contraception is intended for people who do not want future pregnancies. Procedures involving the fallopian tubes prevent sperm and egg from meeting, while vasectomy prevents sperm from entering semen. These methods are highly effective, but they should be approached as permanent even though reversal procedures sometimes exist because reversal is not guaranteed to restore fertility.
Vasectomy does not become effective immediately after the procedure. Follow-up testing is used to confirm that sperm are no longer present before another contraception method is stopped. Permanent contraception also does not protect against STIs. When comparing sterilization with reversible contraception, an IUD or implant may provide similarly low-maintenance pregnancy prevention for someone who wants the option of restoring fertility simply by having the device removed.
Practical context and next steps
A useful way to apply this contraception information is to separate general education from the details that would change an individual decision. The sections on long-acting reversible contraception and pills, patches and rings explain the core ideas, while your own health history, partner context and local services may affect the next step.
If the topic leads to a healthcare appointment, write down what you are noticing, when it started, what has changed and any relevant medicines, contraception or recent exposures. You do not need a diagnosis before asking for help. Clear observations are often more useful than trying to fit yourself into a label found online.
If a partner is involved, use the information to support communication rather than pressure. Share what you know, what remains uncertain and what you need in order to feel comfortable. Related pages such as Contraception Guide, Emergency Contraception, Condoms can provide more detail without turning one article into an answer to every possible question.
Questions such as “Which contraception is most effective?” and “Which birth control protects against STIs?” are useful starting points, but online information has limits. Contact a contraception service promptly after a method failure when pregnancy is possible.
The most effective birth control in theory is not necessarily the best contraception method for every person. Cost, insurance coverage, appointment access, privacy, menstrual preferences, comfort with a procedure, medical history, medication interactions, and how often a method requires attention can all shape real-world use. Some people prioritize hormone-free birth control, while others value lighter periods or a method that can be forgotten about for years.
It is also useful to separate pregnancy prevention from STI prevention. An IUD, implant, pill, patch, ring, or injection may be paired with condoms when both concerns matter. Starting or switching birth control can sometimes require temporary backup contraception depending on the method and timing. Emergency contraception is another distinct option after contraceptive failure or unprotected penis-in-vagina sex; it does not replace an ongoing birth control plan or provide STI protection.
A decision checklist for this topic
Before acting on anything you read here, run through this short check.
Before acting on information about contraception, make a short personal checklist. What exactly are you trying to prevent, understand or improve? Is the issue new or longstanding? Are there symptoms, pain, bleeding, pregnancy possibility, recent exposures, medicines or health conditions that change the decision? Which parts of the page — especially Long-acting reversible contraception, Pills, patches and rings, Injection — apply directly to you, and which are only background information? This approach reduces the chance of taking one sentence out of context or assuming that a common possibility is automatically your diagnosis.
If you are still uncertain after reading, use the questions on this page to decide the next step rather than continuing to search indefinitely. Common starting questions include: Which contraception is most effective?; Which birth control protects against STIs?; What is typical use?. Write down the answer you already know and what remains unknown. Then use Contraception Guide, Emergency Contraception, Condoms or an appropriate healthcare professional to fill the gap. Seeking care is especially important when the missing information depends on examination, a laboratory test, prescription treatment, pregnancy-specific advice or urgent timing.
When to get professional or urgent help
•Contact a contraception service promptly after a method failure when pregnancy is possible.
•Seek urgent care for severe chest pain, difficulty breathing, stroke-like symptoms, severe abdominal pain or other serious symptoms while using a method associated with those risks.
Safety note: If symptoms are severe, rapidly worsening or described above as urgent, use the appropriate local emergency or same-day healthcare service rather than waiting for an online answer.
New symptoms after starting contraception are not automatically dangerous, but severe or unexpected symptoms deserve medical assessment. Examples include intense pelvic or abdominal pain, unexplained fever, very heavy bleeding, fainting, suspected pregnancy, or unusual discharge after an IUD has been placed. Someone who can feel an IUD itself rather than just its strings, or who cannot feel an implant that was previously easy to locate, should also have the device checked.
Urgent evaluation is appropriate for symptoms that could signal a serious complication, such as sudden chest pain, significant shortness of breath, one-sided leg swelling, or new severe neurologic symptoms while using an estrogen-containing method. Persistent side effects that are not emergencies can also be discussed with a clinician; changing contraception is a routine part of care when bleeding, mood changes, headaches, convenience, or other effects make a method difficult to continue.
Questions & Clear Answers
Long-acting reversible methods such as implants and IUDs are among the most effective reversible choices because they require little user action after placement.
References & Sources
Openlywell articles are compiled with reference to published guidance from international public-health authorities, professional colleges and peer-reviewed literature.
- [1]CDC — Contraception and Birth Control Methods
- [2]NHS — Contraception