Choosing Contraception: A Practical Comparison of Pills, IUDs, Implant and More
Key message: There is no single best contraceptive method. The safest choice fits your health, pregnancy plans, bleeding…
Key message: There is no single best contraceptive method. The safest choice fits your health, pregnancy plans, bleeding preferences, ability to use it consistently and need for protection from sexually transmitted infections.
Get urgent help: Seek urgent care for chest pain, sudden breathlessness, coughing blood, one-sided leg swelling, a new severe neurological headache, sudden severe pelvic pain, fever after insertion, or a positive pregnancy test with an IUD or implant and pain or bleeding.
What should be compared before choosing a method?
- How strongly you want to avoid pregnancy and how soon pregnancy may be desired.
- Whether you prefer a daily, per-sex, monthly, injectable or long-acting method.
- Expected changes in bleeding, cramps, acne, mood or other symptoms.
- Migraine, blood pressure, smoking, clot history, liver disease, breast cancer history and medicines.
- Breastfeeding and how recently you gave birth.
- Whether protection from sexually transmitted infections is needed.
- Access, cost, insertion/removal and local product duration.
How effective are the main methods in real life?
Effectiveness falls when pills are missed, injections are late, rings or patches are not changed or condoms slip or tear. Long-acting reversible contraception avoids most user-error.
| Method | Typical-use effectiveness | Key point |
|---|---|---|
| Implant | Over 99% | Long-acting and does not depend on daily memory. |
| Hormonal IUS | Over 99% | Often makes periods lighter or stops them. |
| Copper IUD | Over 99% | Hormone-free; can increase cramps or bleeding. |
| Injection | About 94% | Repeat doses are needed on time; fertility return may be delayed. |
| Combined pill / patch / ring | About 91% | Contains estrogen and requires regular correct use. |
| Progestogen-only pill | About 91% | Requires consistent use; timing rules vary by product. |
| External condom | About 82% | Also reduces many STI risks when used correctly every time. |
What are the long-acting reversible options?
- Implant: a progestogen rod under the arm. It is highly effective, but unpredictable bleeding is common. Duration depends on the licensed product and local guidance, and fertility returns quickly after removal.
- Hormonal IUS: sits inside the uterus and releases progestogen. It often reduces heavy bleeding and cramps; irregular spotting is common initially.
- Copper IUD: contains no hormones and can also provide emergency contraception when inserted within the appropriate window. It may make periods heavier or more painful.
- Insertion and removal require a trained clinician after pregnancy risk, infection risk, uterine factors and consent are reviewed.
What are the shorter-acting hormonal options?
- Combined pill, patch or ring: contain estrogen and progestogen. They can regulate bleeding and improve some acne or period symptoms but are unsuitable with selected clotting, migraine, blood-pressure, smoking, postpartum and other conditions.
- Progestogen-only pill: suitable for many people who cannot use estrogen and commonly changes bleeding. Missed-pill rules differ by preparation.
- Injection: convenient for some patients and may stop periods, but can cause irregular bleeding, temporary bone-density change and a delay in return to fertility after the final injection.
Who should avoid an estrogen-containing method?
Suitability is assessed using current medical eligibility criteria. Estrogen-containing contraception is usually avoided or needs specialist review with migraine with aura, current or previous venous thrombosis, severe or uncontrolled hypertension, smoking at age 35 or over, selected heart or liver disease, breast cancer, and certain early-postpartum situations.
Do not stop or start a method solely from a checklist; the severity, timing and other risk factors matter.
Which methods are suitable while breastfeeding or after birth?
Progestogen-only pills, implants, injections and intrauterine contraception can be used in many postpartum and breastfeeding situations, with timing based on the method and birth circumstances.
Combined estrogen-containing contraception is delayed after birth because clot risk is temporarily higher, and breastfeeding can affect timing. A dedicated postpartum discussion is safer than using a general rule.
Which method helps heavy or painful periods?
- A hormonal IUS is often highly effective for heavy bleeding when the uterine cavity is suitable.
- Combined hormonal methods and some progestogen methods may make bleeding lighter or more predictable.
- The copper IUD can increase bleeding and cramps, so it may not suit someone with heavy periods or anaemia.
- Unexplained abnormal bleeding should be assessed rather than hidden with hormones without a diagnosis.
How quickly does fertility return?
- Fertility usually returns rapidly after pills, patch, ring, implant and IUD/IUS removal.
- The injection can delay ovulation and conception for several months after the final dose, although it does not cause permanent infertility.
- Age and underlying fertility conditions still affect the chance of pregnancy after stopping any method.
Which method protects against infections?
External and internal condoms reduce the risk of many sexually transmitted infections and can be used with another method for additional pregnancy protection.
Pills, injections, implants and intrauterine methods do not protect against infection. New partners, symptoms or exposure may require testing.
What about emergency contraception?
- A copper IUD is the most effective emergency option when suitable and inserted within the recommended time window; it then provides ongoing contraception.
- Emergency pills must be taken within a method-specific window after unprotected sex, and their effectiveness can be affected by timing, body weight and medicines.
- After emergency contraception, discuss when to start or restart regular contraception and whether a pregnancy test is needed.
How is a shared decision made?
- List your top priorities: effectiveness, no hormones, lighter bleeding, privacy, rapid fertility return or STI protection.
- Review medical eligibility and drug interactions.
- Discuss expected bleeding changes and what would lead you to stop the method.
- Agree how to manage side effects and where insertion, removal or replacement will occur.
- Choose a backup and emergency plan if the method is missed or delayed.
Frequently asked questions
Does an IUD cause infertility?
No. Fertility returns quickly after removal. Untreated sexually transmitted infection—not the device itself—is the important infection-related fertility risk.
Will every method cause weight gain?
No. Weight changes vary. The injection has the clearest association for some users, while individual responses differ with all methods.
Can I become pregnant immediately after stopping?
Fertility returns quickly after most methods, but may be delayed after the injection.
Do hormonal methods protect from sexually transmitted infections?
No. Condoms are the main contraceptive method that also reduces many STI risks.
Is the implant always licensed for the same number of years?
No. Licensed duration can change by product and country, so confirm the locally licensed product and duration when choosing or replacing the method.
Your next step
Book a contraception consultation with your medical history, migraine details, blood-pressure information, medicines, breastfeeding status and pregnancy plans. Urgent symptoms after starting or inserting a method should follow emergency care rather than routine booking.
Medical and content review: Dr Mohamed Abdelghany, Obstetrics & Gynecology Specialist, MRCOG (UK), MSc Obstetrics & Gynecology – Kasr Al-Ainy, Cairo University.
Last reviewed: 22 August 2026.
This information is for general education and does not replace individual medical assessment. Severe, sudden or concerning symptoms should not wait for a routine appointment.
