Contraception: The FPA Guide

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Last update: July 2025
Review date: November 2026
Version: 16.01.25.07.W

Contraception: The FPA Guide

Contraceptive methods you have to use and think about regularly or each time you have sex – must be used according to instructions:

Contraception: The FPA Guide

This guide gives an overview of the available contraceptive methods, explains how they work, how effective they are and the main advantages and disadvantages. The figures for how well each method works are from independent research.

Figures are given for perfect use and typical use.

  • Perfect use means using the method correctly and consistently every time
  • Typical use is when you don’t always use the method correctly and consistently

Contraception needs to be used until the menopause. This is 2 years after last having a natural period if you’re aged under 50, or 1 year if aged over 50. This advice may be different if you’re using hormonal contraception. Also see our Menopause guide.

Some contraception has non-contraception benefits. You can continue a suitable method of contraception until you’re aged 55 to take advantage of these benefits.

By finding out more about each method, you can choose contraception that suits you.

For detailed information about each method – see our detailed contraception guides.

You can also talk about the methods with a healthcare professional.

Some things to consider are:

  • whether you (or a partner) want to get pregnant fairly soon, many years away or not at all
  • whether you (or a partner) want to use a contraceptive method every day, every time you have sex or less often
  • whether a method is likely to affect periods
  • how effective each method is
  • any possible side effects or benefits

You can get free contraception, including emergency contraception, from:

  • A contraception clinic or sexual health clinic
  • Most GP surgeries
  • Some young people’s services – these will have an upper age limit
  • Many pharmacies (emergency contraception)
  • Some pharmacies (combined pill and progestogen-only pill)
  • Some online sexual health services. They may be able to send emergency contraception and some other types of contraception by post, and may offer a click and collect service. You usually need to be 16 or over and have an online or phone consultation

If a service doesn’t offer the contraception you want, they can usually tell you where to get it.

You can also get emergency contraceptive pills free from:

  • Some genitourinary medicine (GUM) clinics
  • Some NHS walk-in centres (England only)
  • Some urgent treatment centres or minor injuries units

You can buy, without a prescription:

  • The desogestrel progestogen-only pill from most pharmacies
  • Emergency contraceptive pills from most pharmacies
  • Condoms from most pharmacies
  • Diaphragms and caps from an online supplier

You can also buy emergency contraceptive pills and some types of contraception from some online pharmacies, private online sexual health services and private clinics. You may need to be 16 or over to use some of these services.

The Sexual Health Helpline gives confidential advice and information on sexual health - including contraception.

The number is 0300 123 7123. It's open Monday to Friday from 9am to 8pm and at weekends from 11am to 4pm.

You can also find our full range of Family Planning Association's patient information guides here.

Find details of sexual health clinics and services, GP surgeries and pharmacies on these websites:

If you've had sex without contraception, or think your method might have failed, you can use emergency contraception.

Try to get emergency contraception as soon as possible after unprotected sex to give it the best chance of working.

A copper intrauterine device (IUD) is the most effective option. Some people will get pregnant even when they take emergency pills correctly.

  • An emergency IUD (copper coil) can be fitted up to 5 days after sex, or up to 5 days after the earliest time you could have ovulated (released an egg).
  • An emergency contraceptive pill with the active ingredient ulipristal acetate (UPA) can be taken up to 5 days (120 hours) after sex.
  • An emergency contraceptive pill with the hormone levonorgestrel can be taken up to 3 days (72 hours) after sex.

Emergency pills are available for free from sexual health clinics, GP surgeries and many pharmacies, or you can buy them from most pharmacies.

For more details see our guide to Emergency Contraception here.

The emergency IUD stops an egg being fertilised or implanting in the uterus (womb).

Emergency contraceptive pills work by delaying ovulation (release of an egg). They won’t work if you’ve already ovulated.

Only about 1 in 1,000 people will become pregnant after having an emergency IUD fitted.

Emergency pills taken before ovulation (release of an egg) can be effective, especially if taken soon after sex, but some people will still get pregnant even though they took the pill correctly.

Emergency contraception isn’t as effective as using other methods of contraception regularly and doesn’t protect you from sexually transmitted infections.

Also see the FPA’s guide to emergency contraception.

Breastfeeding can be over 98% effective in preventing pregnancy for up to 6 months after giving birth if all of the following apply:

  • you’re fully, or nearly fully, breastfeeding, day and night – this means you’re only giving your baby breast milk, or you’re infrequently giving other liquids in addition to your breast milk
  • your baby is less than 6 months old
  • you haven’t had a period since the birth

Even if all the above apply, certain situations increase your risk of pregnancy.

For more information, see contraceptive choices after you’ve had your baby.

If you think you could be pregnant, do a pregnancy test as soon as possible.

You can do a test from the first day of a missed period – before this time the level of pregnancy hormone, human chorionic gonadotrophin (hCG), may be too low to show up on a test so you may get a negative result even though you are pregnant.

If you don’t know when your next period is due, the earliest time to do a test is 21 days after unprotected sex.

If you’re pregnant, you can choose to:

  • continue with the pregnancy and be a parent
  • end the pregnancy by having an abortion
  • continue with the pregnancy and choose adoption

Most methods of contraception don't protect you from sexually transmitted infections (STIs).

Condoms and internal condoms (also known as female condoms), used correctly and consistently, can help protect against STIs.

For more details see our sexually transmitted infection guides here.

Methods that don’t depend on you remembering to take or use them

Effectiveness:

The implant is the most effective method of contraception.

It’s well over 99% effective. About 1 in 1,000 implant users will get pregnant in the first year of use.

Once it’s fitted, it works for contraception for 3 years.

How it works:

A small flexible rod is put just under the skin of the upper arm. It releases the hormone progestogen, which stops ovulation, thickens cervical mucus so it’s hard for sperm to reach an egg, and thins the lining of the uterus (womb) to stop a fertilised egg implanting.

Advantages:

  • Works for 3 years but can be taken out sooner
  •  You don’t have to think about contraception for as long as the implant is in place
  • When the implant is removed your periods and fertility will return to normal

Disadvantages:

  • Bleeding is unpredictable. It may be irregular, stop or last longer
  • A small procedure is needed to fit and remove it
  • Implant users may have a small increased risk of breast cancer compared to non-users of hormonal contraception

Comments:

  • Inserted using a local anaesthetic and no stitches are needed
  • At first, your arm may be tender, bruised or a bit swollen
  • You should be able to feel the implant with your fingers, but it can’t be seen
  • Some medicines may stop the implant from working

More info:

Effectiveness:

Over 99% effective.

Fewer than 1 in 100 hormonal IUD users will get pregnant in a year.

Once it’s fitted, it works for contraception for 3, 6 or 8 years, depending on type.

How it works:

A small, flexible T-shaped plastic device is put into the uterus (womb) where it releases the hormone progestogen. It thins the lining of the uterus to stop a fertilised egg implanting and thickens cervical mucus so it’s hard for sperm to reach an egg.

Advantages:

  • Works for 3, 5 or 8 years depending on type, but can be taken out sooner
  • Bleeding usually becomes lighter, shorter, less frequent and less painful, or it may stop
  • You don’t have to think about contraception for as long as the hormonal IUD is in place
  • When it’s removed, periods and fertility return to normal

Disadvantages:

  • Bleeding may be unpredictable in the first few months
  • Insertion can be uncomfortable or painful for some people
  • Very small chance of getting an infection during the first few weeks after insertion
  • Hormonal IUD users may have a small increased risk of breast cancer compared to non-users of hormonal contraception

Comments:

  • You’re taught to check the hormonal IUD is in place
  • Not affected by other medicines
  • If fitted at or after age 45, a Mirena, Levosert or Benilexa IUD can stay in place as contraception until you’re aged 55
  • A check for any existing infection may be advised before a hormonal IUD is put in

More info:

Effectiveness:

Over 99% effective.

Fewer than 1 in 100 copper IUD users will get pregnant in a year.

Once it’s fitted, it works for contraception for 5 or 10 years, depending on type.

How it works:

A small, flexible plastic and copper device is put into the uterus (womb).

The copper stops sperm and eggs from surviving. It also changes your cervical mucus to stop sperm from reaching an egg.

A copper IUD may also stop a fertilised egg implanting in the uterus.

Advantages:

  • Works as soon as it’s put in
  • Works for 5 or 10 years depending on type, but can be taken out sooner
  • You don’t have to think about contraception for as long as the copper IUD is in place
  • When the copper IUD is removed your periods and fertility will return to normal

Disadvantages:

  • Periods may be heavier or longer and more painful
  • Insertion can be uncomfortable or painful for some people
  • Very small chance of getting an infection during the first few weeks after insertion

Comments:

  • You’re taught to check the copper IUD is in place
  • Not affected by other medicines
  • If fitted at or after age 40, both the 5 year and 10 year copper IUD can stay in place as contraception until the menopause
  • A check for any existing infection may be advised before a copper IUD is put in

More info:

Effectiveness:

With perfect use, over 99% effective; fewer than 1 in 100 injection users will get pregnant in a year.

With typical use, about 96% effective; around 4 in 100 injection users will get pregnant in a year.

How it works:

Releases the hormone progestogen which stops ovulation, thickens cervical mucus so it’s hard for sperm to reach an egg, and thins the lining of the uterus (womb) to stop a fertilised egg implanting.

Advantages:

  • Lasts for 13 weeks (Depo Provera and Sayana Press)
  • You don’t have to think about contraception for as long as the injection lasts
  • May reduce heavy, painful periods for some people

Disadvantages:

  • Bleeding may stop, be irregular or last longer
  • Periods and fertility may take time to return after stopping the injection
  • Some people gain weight
  • Injection users may have a small increased risk of breast cancer compared to non-users of hormonal contraception

Comments:

  • The injection can’t be removed from the body so any side effects may continue for as long as it works and for some time afterwards
  • Not affected by other medicines, diarrhoea or vomiting
  • It’s important to have your next injection at the right time

More info:

Effectiveness:

Over 99% effective. After a successful procedure, there’s around a 1 in 200 chance of getting pregnant.

This is a permanent method, suitable for people who are sure they never want children or don’t want more children.

How it works:

You have an operation in hospital.

The fallopian tubes are blocked, or cut then tied to stop them rejoining. This stops an egg and sperm from meeting.

Advantages:

  • It’s highly effective at preventing pregnancy
  • Once the sterilisation has worked, you don’t have to think about contraception
  • Periods are unaffected

Disadvantages:

  • You’ll need other contraception until the sterilisation is effective
  • You need a surgical procedure
  • All operations carry some risk, but the risk of serious complications is low
  • There’s a small increased risk of ectopic pregnancy if the sterilisation fails
  • Sterilisation can’t easily be reversed

Comments:

  • Shouldn’t be chosen if in any doubt, and counselling is important
  • You may experience discomfort or some pain for a short time after sterilisation. It’s important to rest and avoid strenuous activity for a while after the procedure

More info:

Effectiveness:

Well over 99% effective. After a successful vasectomy, there’s around a 1 in 2,000 chance of a partner getting pregnant.

This is a permanent method, suitable for people who are sure they never want children or don’t want more children.

How it works:

The tubes (vas deferens) that carry sperm from the testicles to the penis are blocked by sealing them with heat and may also be divided (cut).

A vasectomy may be done in a GP surgery, sexual health clinic or hospital outpatient department.

Advantages:

  • It’s highly effective at preventing pregnancy
  • Once the sterilisation has worked, you don’t have to think about contraception
  • Usually performed under a local anaesthetic

Disadvantages:

  • Contraception must be used until the vasectomy becomes effective. This takes at least 12 weeks and may take longer
  • A small number of people get ongoing testicle pain but this isn’t common. Treatment for this is not always successful
  • Sterilisation can’t easily be reversed

Comments:

  • Shouldn’t be chosen if in any doubt, and counselling is important
  • You may experience discomfort or some pain for a short time after sterilisation. It’s important to rest and avoid strenuous activity for a while after the procedure
  • Some people also experience ongoing pain (see above)

More info:

Methods you have to use and think about regularly or each time you have sex. Must be used according to instructions

Effectiveness:

Over 99% effective if always used according to instructions (perfect use); fewer than 1 in 100 ring users will get pregnant in a year.

With typical use, about 93% effective; around 7 in 100 ring users will get pregnant in a year.

How it works:

You put a small, flexible plastic ring into your vagina, where it releases 2 hormones, oestrogen and progestogen.

It stops ovulation, thickens cervical mucus so it’s hard for sperm to reach an egg, and thins the lining of the uterus (womb) to stop a fertilised egg implanting.

Advantages:

  • You don’t have to think about it every day
  • It’s not affected if you vomit or have diarrhoea
  • It usually makes bleeding regular, lighter and less painful
  • It improves acne for some people
  • Suitable until aged 50 for non-smokers with no health concerns

Disadvantages:

  • Not suitable if you’re a smoker aged over 35, very overweight, or have certain medical conditions
  • A small risk of serious side effects such as blood clots, breast cancer and cervical cancer
  • Can be temporary side effects such as increased vaginal discharge, headaches, nausea, mood changes and breast tenderness

Comments:

  • You must be comfortable with inserting and removing it
  • One ring is used for 3 weeks
  • Some medicines can make it less effective
  • Breakthrough bleeding and spotting may occur in the first few months
  • You can choose not to have a monthly bleed

More info:

Effectiveness:

Over 99% effective if always used according to instructions (perfect use); fewer than 1 in 100 patch users will get pregnant in a year.

With typical use, about 93% effective; around 7 in 100 patch users will get pregnant in a year.

How it works:

A small patch is stuck on the skin. It releases 2 hormones, oestrogen and progestogen.

It stops ovulation, thickens cervical mucus so it’s hard for sperm to reach an egg, and thins the lining of the uterus (womb) to stop a fertilised egg implanting.

Advantages:

  • You don’t have to think about it every day
  • It’s not affected if you vomit or have diarrhoea
  • It usually makes bleeding regular, lighter and less painful
  • It improves acne for some people
  • Suitable until aged 50 for non- smokers with no health concerns

Disadvantages:

  • Not suitable if you’re a smoker aged over 35, very overweight, or have certain medical conditions
  • A small risk of serious side effects such as blood clots, breast and cervical cancer
  • Can be temporary side effects such as headaches, nausea, mood changes and breast tenderness
  • Possible skin irritation

Comments:

  • May be seen
  • Once a week, you take the patch off and put on a new one
  • Some medicines can make it less effective
  • Breakthrough bleeding and spotting is common in the first few months
  • You can choose not to have a monthly bleed

More info:

Effectiveness:

Over 99% effective if always taken according to instructions (perfect use); fewer than 1 in 100 pill users will get pregnant in a year.

With typical use, about 93% effective; around 7 in 100 pill users will get pregnant in a year.

How it works:

Contains 2 hormones – oestrogen and progestogen.

It stops ovulation, thickens cervical mucus so it’s hard for sperm to reach an egg and thins the lining of the uterus (womb) to stop a fertilised egg implanting.

Advantages:

  • It usually makes bleeding regular, lighter and less painful
  • Reduces risk of cancer of the ovary, uterus and colon
  • Suitable until aged 50 for non-smokers with no health concerns
  • When you stop using the combined pill your fertility will return to normal

Disadvantages:

  • Not suitable if you’re a smoker aged over 35, very overweight, or have certain medical conditions
  • A small risk of serious side effects such as blood clots, breast cancer and cervical cancer
  • Can be temporary side effects such as headaches, nausea, mood changes and breast tenderness

Comments:

  • Missing pills, vomiting or severe, long-lasting diarrhoea can make it less effective
  • Some medicines can make it less effective
  • Breakthrough bleeding and spotting is common in the first few months
  • You can choose not to have a monthly bleed

More info:

Effectiveness:

Over 99% effective if always taken according to instructions (perfect use); fewer than 1 in 100 pill users will get pregnant in a year.

With typical use, about 93% effective; around 7 in 100 pill users will get pregnant in a year.

How it works:

Contains the hormone progestogen. POPs that contain either desogestrel or drospirenone stop ovulation. Other POPs may sometimes do this.

All POPs thicken cervical mucus so it’s hard for sperm to reach an egg and thin the lining of the uterus (womb) to stop a fertilised egg implanting.

Advantages:

  • Can be used if you can’t use oestrogen
  • Can be used if you smoke and are aged over 35
  • Can be used if you’re overweight, if you have migraines, or if you have certain medical conditions that stop you using the combined pill
  • May help with premenstrual symptoms and painful periods

Disadvantages:

  • Bleeding can be unpredictable. It may be irregular, lighter, shorter, last longer or stop completely
  • May be temporary side effects such as acne, breast tenderness, mood changes and headaches
  • POP users may have a small increased risk of breast cancer compared to non-users of hormonal contraception

Comments:

  • Must be taken at the same time each day
  • Not effective if taken more than 24 hours late (drospirenone POP), 12 hours late (desogestrel POP) or 3 hours late (other types of POP)
  • Vomiting or severe diarrhoea can make it less effective
  • Some medicines can make it less effective

More info:

Effectiveness:

98% effective if always used according to instructions (perfect use); 2 in 100 people using external condoms as their only contraception will get pregnant in a year.

With typical use, around 87% effective; around 13 in 100 people using external condoms as their only contraception will get pregnant in a year.

How it works:

External condoms are also known as male condoms.

An external condom is made of very thin latex (rubber), polyurethane (plastic), or polyisoprene (synthetic latex).

It’s put over the erect penis and stops sperm from entering the vagina.

Advantages:

  • Can help protect from sexually transmitted infections
  • No serious side effects
  • Available in different shapes and sizes
  • Free from contraception and sexual health clinics, young people’s services, and some GP surgeries and GUM clinics. Widely available to buy

Disadvantages:

  • May slip off or split if not used correctly or if the wrong size or shape is used
  • The penis needs to be withdrawn from the vagina straight after ejaculation before the penis goes soft, being careful not to spill any semen

Comments:

  • Use a new condom each time and follow the instructions carefully
  • Must be put on before the penis touches a partner’s genital area
  • Oil-based lube and other products damage latex condoms, but can be used with polyurethane condoms
  • Use extra lube when using condoms for anal sex

More info:

Effectiveness:

95% effective if always used according to instructions (perfect use); 5 in 100 people using internal condoms as their only contraception will get pregnant in a year.

With typical use, about 79% effective; around 21 in 100 people using internal condoms as their only contraception will get pregnant in a year.

How it works:

Internal condoms are also known as female condoms.

An internal condom is made of soft, thin nitrile (synthetic rubber), latex (rubber) or polyurethane (plastic). It loosely lines the vagina and covers the area just outside.

It stops sperm from entering the vagina.

Advantages:

  • Can help protect from sexually transmitted infections
  • Can be put in any time before sex
  • No serious side effects
  • Free from contraception and sexual health clinics, young people’s services, and some GP surgeries and GUM clinics. Can be bought online and in some pharmacies

Disadvantages:

  • Need to make sure the penis enters the condom and doesn’t go between the vagina and the condom
  • May get pushed into the vagina
  • Not as widely available as external condoms

Comments:

  • Use a new condom each time and follow the instructions carefully
  • Must be put in before contact with the penis
  • Oil-based lube and other products damage latex condoms, but can be used with polyurethane condoms
  • Use extra lube if using internal condoms for anal sex

More info:

Effectiveness:

78% to 84% effective, depending on type, if used according to instructions (perfect use); around 16 to 22 in 100 users will get pregnant in a year.

With typical use, about 78% to 83% effective, depending on type; around 17 to 22 in 100 users will get pregnant in a year.

How it works:

A flexible silicone device, used with contraceptive gel or with spermicide, is put into the vagina to cover the cervix (entrance to the uterus).

This makes it hard for sperm to enter the uterus (womb) and reach an egg.

Advantages:

  • Can be put in up to 2 hours before sex, or earlier as long as you then add more contraceptive gel or spermicide before having sex
  • You only have to use it when you have sex
  • No serious side effects

Disadvantages:

  • Needs to be left in for 6 hours after sex
  • Extra contraceptive gel or spermicide is needed if you have sex again
  • Can take time to learn how to use correctly
  • Some people can be sensitive to spermicide

Comments

  • You need to use the correct size. A trained healthcare professional can check this
  • You may need a different size after you’ve had a baby or if you gain or lose more than 3kg (7lb) in weight
  • Contraceptive gel or spermicide may not be available from free services, so you may need to buy this

More info:

Effectiveness:

95% to over 99% effective if used according to teaching and instructions (perfect use); between 5 and fewer than 1 in 100 users will get pregnant in a year.

With typical use, about 77% to 98% effective; around 2 to 23 in 100 users will get pregnant in a year.

How it works:

The fertile and infertile times of the menstrual cycle are identified by noting the different fertility indicators. This shows when you can have sex without risking pregnancy.

Effectiveness varies depending on the method used.

Advantages:

  • No physical side effects
  • Gives you greater awareness of your body and menstrual cycle
  • Can also be used to plan a pregnancy

Disadvantages:

  • Need to avoid sex or use condoms, or another barrier method of contraception, at fertile times of the cycle
  • You have to keep daily records
  • Changes to routine, such as illness, stress, travel, sleep changes, or drinking alcohol, may affect fertility indicators

Comments:

  • It takes 3 to 6 menstrual cycles to learn effectively.
  • There are different contraception and fertility apps available. More research is needed to say how effective these are at helping to prevent pregnancy. Talk to a professional for support using an app to prevent pregnancy.


A final word

This guide can only give you general information. The information is based on evidence-guided research from The College of Sexual and Reproductive Healthcare (CoSRH (was FSRH)), the National Institute for Health and Care Excellence (NICE), and the World Health Organization.

All methods of contraception come with a Patient Information Leaflet which gives detailed information about the method.

Contact your healthcare professional or a sexual health clinic if you’re worried or unsure about anything.

This guide was accurate at the time of writing. Guides are reviewed regularly.

Last complete review: July 2025, last clinical update: July 2025, next review scheduled: November 2026.

If you’d like information on the evidence used to produce this guide or would like to give feedback, email fpadirect@fpa.org.uk.

Copyright, licencing and getting more copies

This guide is available under licence. To copy, share or reproduce any information from this guide you need prior written consent from the FPA.

To order copies of this guide go to fpa.org.uk/shop.

Medical professionals can also send a Purchase Order. For this guide please use reference: PO1016

Family Planning Association and FPA are trading names of Family Planning Ltd, 15486597.

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