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Male condoms are 98% effective when used correctly, and a copper IUD is over 99% effective for up to 10 years. Free notes and 14 questions answered.
Evaluating contraceptive methods is part of Hormonal coordination in humans in GCSE AQA Higher Biology.
3 min
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GCSE AQA Higher
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Male condoms are 98% effective when used correctly, and a copper IUD is over 99% effective for up to 10 years. Free notes and 14 questions answered.
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Use this lesson to stay inside Hormonal coordination in humans while connecting the detail back to the wider Homeostasis and response topic.
Read the core explanations from Evaluating contraceptive methods before testing yourself from memory.
Imagine two teenagers - one wants to prevent pregnancy but struggles to remember daily medication, another has heavy periods and wants hormonal help. The same contraceptive method won't work for both. Understanding how different methods work helps people make informed choices about their reproductive health.
Contraceptive methods fall into two main categories: hormonal (using synthetic hormones) and non-hormonal (physical or chemical barriers). Each has different effectiveness rates, side effects, and suitability for different lifestyles.
The combined pill works by tricking your body into thinking it's already pregnant. The synthetic hormones stop the pituitary gland releasing FSH and LH, so no eggs mature or get released. It's over 99% effective when taken correctly - but here's the catch: 'correctly' means same time every day, no missed pills.
Advantages: Highly effective, can reduce period pain and acne, reversible. Disadvantages: Must remember daily, side effects like nausea and mood changes, small increased risk of blood clots, doesn't protect against STIs.
The 'mini-pill' works differently - it thickens the mucus at the cervix entrance, making it nearly impossible for sperm to swim through. Some types also stop ovulation. It's suitable for women who can't take oestrogen due to health risks like blood clots.
Advantages: Safe for most women, can be used while breastfeeding. Disadvantages: Must be taken within 3 hours of the same time daily, irregular bleeding common, slightly less effective than combined pill.
Other hormonal methods include contraceptive injections (last 3 months), implants (last 3 years), and patches (changed weekly). These remove the daily memory requirement but have their own trade-offs in terms of side effects and reversibility.
Barrier methods work by physically blocking sperm. Male condoms are 98% effective when used correctly and are the only method that also protects against sexually transmitted infections. Female condoms, diaphragms, and cervical caps work similarly but are inserted into the vagina.
Advantages: No hormonal side effects, protect against STIs (condoms), can be used when needed. Disadvantages: Must be used every time, can interrupt spontaneity, risk of tearing or displacement.
The copper IUD releases copper ions that are toxic to sperm and eggs, preventing fertilisation. It's over 99% effective and lasts up to 10 years. The hormonal IUD (like Mirena) releases progesterone locally, thickening cervical mucus and thinning the uterine lining.
Other non-hormonal methods include spermicides (chemicals that kill sperm), natural family planning (tracking fertile periods), and sterilisation (permanent surgical procedures). Each has very different effectiveness rates and suitability.
Worked example: Evaluating Contraceptive Methods
A 25-year-old woman wants highly effective contraception but has a history of blood clots. She's in a long-term relationship and doesn't want daily medication. Evaluate suitable options.
Answer: Copper IUD would be most suitable - highest effectiveness, longest duration, no hormonal contraindications
When evaluating contraceptive methods, consider multiple factors: effectiveness rate, side effects, medical contraindications, lifestyle factors, cost, and whether STI protection is needed. No single method is perfect for everyone.
Evaluation questions about contraception require you to weigh up advantages and disadvantages, then reach a conclusion. Don't just list facts - you need to make judgements about which factors are most important in different scenarios.
Common exam mistakes: Stating that the pill is 100% effective (it's >99% with perfect use), forgetting to mention that hormonal methods don't protect against STIs, or not considering individual circumstances when recommending methods.
Published by Revise Right. Use the official specification reference to check the requirements for your course. Content updated: 2026-03-20.
Move to the related lessons or back to the topic page when you need the wider sequence before exam-style practice.
Side effects of the combined pill can include nausea and mood changes, and there is a small increased risk of blood clots. It also does not protect against STIs, though it can reduce period pain and acne.
Male condoms are 98% effective when used correctly, and they are the only method that also protects against sexually transmitted infections. They must be used every time and carry a risk of tearing.
The progesterone-only pill, or mini-pill, contains only synthetic progesterone, which thickens the mucus at the cervix entrance so sperm can barely swim through; some types also stop ovulation. It suits women who cannot take oestrogen, but must be taken within 3 hours of the same time daily.
A copper IUD lasts up to 10 years and is over 99% effective. It releases copper ions that are toxic to sperm and eggs, preventing fertilisation, and contains no hormones.
The combined pill is over 99% effective when taken correctly, can reduce period pain and acne, and is reversible. However, it must be remembered daily, can cause nausea and mood changes, has a small increased risk of blood clots, and does not protect against STIs.
The progesterone-only 'mini-pill' can be used while breastfeeding and is safe for most women, including those who cannot take oestrogen. It must be taken within 3 hours of the same time daily and often causes irregular bleeding.
The combined pill, implant, copper IUD and hormonal IUD are all over 99% effective when used correctly, while male condoms are 98% effective. Barrier methods used alone and natural family planning are less effective, and no method is 100% effective.
Barrier methods have no hormonal side effects, condoms protect against STIs, and they can be used only when needed. However, they must be used every time, can interrupt spontaneity, and carry a risk of tearing or displacement.
Condoms are the only contraceptive method that also protects against sexually transmitted infections. Male condoms are 98% effective when used correctly, while hormonal methods such as the pill do not protect against STIs.
A woman with a history of blood clots should avoid oestrogen, ruling out the combined pill. Suitable highly effective options include the copper IUD (over 99%, 10 years, no hormones), the hormonal IUD (5 years, progesterone only) and the implant (3 years, progesterone only).
The contraceptive pill is not 100% effective; the combined pill is over 99% effective with perfect use, which means taking it at the same time every day with no missed pills. Saying it is 100% effective is a common mistake.
A copper IUD releases copper ions that are toxic to sperm and eggs and lasts up to 10 years, while a hormonal IUD releases progesterone locally, thickening cervical mucus and thinning the uterine lining, and lasts about 5 years.
The right contraception depends on effectiveness rate, side effects, medical contraindications, lifestyle factors, cost, and whether STI protection is needed. No single method is perfect for everyone.
The combined pill prevents ovulation because its synthetic oestrogen and progesterone stop the pituitary gland releasing FSH and LH, so no eggs mature or get released.