Contraception includes short-acting, long-acting, permanent and fertility-awareness methods.
What to know
Methods differ in how they work, how often they require action, how quickly fertility returns and whether they affect bleeding.
Only condoms help reduce transmission of many sexually transmitted infections. Medical history, medicines, breastfeeding and pregnancy plans may affect which options are suitable.
Key points
EffectivenessConsider typical use, not only perfect use.
ConvenienceChoose a method you can use consistently.
Bleeding changesAsk what cycle changes are common.
STI protectionUse condoms when STI protection is needed.
Signs and symptoms
Contraceptive effects vary by method. Changes in bleeding, cramping, skin, mood or other symptoms should be discussed if troublesome.
Bleeding changes
Hormonal methods may cause lighter, absent, irregular or initially unpredictable bleeding. A copper IUD may increase bleeding or cramps.
Method-specific effects
Nausea, breast tenderness, headache, skin changes or injection-site effects can occur with some methods.
Warning symptoms
Severe chest pain, breathlessness, one-sided leg swelling, severe headache or neurological symptoms require urgent assessment.
Pregnancy possibility
No method is perfect. Take a pregnancy test if a period is late or pregnancy symptoms occur, depending on the method used.
Causes and contributing factors
Methods prevent pregnancy in different ways: suppressing ovulation, thickening cervical mucus, changing sperm movement or preventing sperm from reaching an egg.
Short-acting methodsPills, patches, rings and injections require repeat action on a schedule.
Long-acting reversible methodsImplants and IUDs work for years and are reversible without daily action.
Barrier methodsCondoms reduce pregnancy risk and also reduce transmission of many STIs when used correctly.
Permanent and behavioural methodsSterilisation is intended to be permanent. Fertility-awareness methods require careful tracking and have lower typical-use effectiveness.
How healthcare professionals assess it
Assessment is individual. Not every person needs every test, and results must be interpreted alongside symptoms, history and examination findings.
Priorities and reproductive goals
Discuss desired duration, privacy, bleeding preferences, pregnancy timing and ability to use a method consistently.
Medical eligibility
Blood pressure, migraine type, smoking, clotting history, medicines, breastfeeding and other conditions can affect safe choices.
Pregnancy exclusion
A clinician uses menstrual and sexual history and, when needed, testing to reasonably exclude pregnancy.
Informed choice
Benefits, common effects, rare risks, insertion procedures, follow-up and return to fertility should be explained.
Treatment and management
The best method is medically suitable and acceptable to the person using it. Switching methods is reasonable when needs change.
Use correctly
Understand missed-dose instructions, replacement dates, medicine interactions and when backup contraception is needed.
Dual protection
Use condoms when STI protection is important, even if another contraceptive method prevents pregnancy.
Emergency contraception
Time-sensitive options are available after unprotected sex or method failure; seek advice promptly.
Review and switch
Side effects often improve, but persistent or unacceptable effects deserve review and an alternative plan.
Practical steps you can take
Keep written instructions for missed pills, late injections or device concerns.
Check whether new medicines or herbal products reduce effectiveness.
Know the replacement or removal date for implants and IUDs.
Do not rely on cycle predictions alone if avoiding pregnancy is essential.
Keep condoms available and learn correct use before they are needed.
Questions to ask at an appointment
Writing questions down can make a consultation more useful, especially when symptoms are stressful or complex.
- How effective is this method in typical use?
- How might it change bleeding, pain, skin, mood or sexual health?
- Does my health history or another medicine make it unsuitable?
- How quickly does fertility return after stopping, and what should I do after a missed dose?
Common questions
Does contraception cause permanent infertility?
Reversible methods do not cause permanent infertility. Return to fertility varies; the injection may have a longer delay than other reversible methods.
Do all methods protect against STIs?
No. Condoms are the contraceptive method that also reduces transmission of many STIs.
Can I use contraception while breastfeeding?
Several methods are suitable, but timing and individual medical factors matter. Ask for postpartum advice.
When to speak with a healthcare professional
Arrange an assessment if symptoms concern you, affect daily life, persist, worsen or are different from what is normal for you.
You have migraines with aura, clotting history or uncontrolled blood pressureContact a qualified healthcare professional for individual assessment.
You are postpartum or breastfeedingContact a qualified healthcare professional for individual assessment.
You need emergency contraception or had unprotected sexContact a qualified healthcare professional for individual assessment.
This guide is educational. It does not diagnose a condition or replace care from a qualified healthcare professional.
Medical references
This guide was prepared from authoritative public-health and professional medical resources.
Have questions about this topic?
Discuss your symptoms, history and next steps privately with Dr. Benny.