Long-acting reversible contraceptives
LARCs
Granskad av Dr Colin Tidy, MRCGPSenast uppdaterad av Dr Rosalyn Adleman, MRCGPLast updated 10 Feb 2023
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I denna serie:Contraceptive implantContraceptive injectionIntrauterine contraceptive deviceLevonorgestrel intrauterine device
Long-acting reversible contraceptives are very effective birth control methods. When you use one of these, you do not have to rely on remembering something every day. They last between 2 months and 10 years, depending on the option used. They may come in the form of injections, implants, and also devices which are placed in your womb (uterus).
At a glance
Long-acting reversible contraception (LARC) provides contraception for months or years.
There are four main types of LARC: the implant, the injection, the IUCD, and the IUS.
LARCs are very effective because you do not need to remember to take a pill daily.
All LARCs require a small procedure for insertion or administration.
LARCs are reversible, meaning you can become fertile again after removal or stopping.
I den här artikeln:
Video picks for Long-acting reversible contraceptives
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What are the long-acting reversible contraceptive choices?
There are four types of long-acting reversible contraception (LARC).
The contraceptive implant. A minor procedure under local anaesthetic is needed to insert the small, rod-shaped implant under the skin in your upper arm, where it remains. The implant releases a progestogen hormone. Each implant lasts three years. Read about the contraceptive implant.
The contraceptive injection. An injection of a progestogen hormone is given every three months (two months for one brand), most commonly into the muscle in your bottom. Read about the contraceptive injection.
The intrauterine contraceptive device (IUCD). This is also known as 'the coil'. It sits inside the womb (uterus) and, once fitted, can stay in your womb for up to ten years. The device is called a coil because in the 1960s some devices were coil-shaped. Read about the intrauterine contraceptive device.
The intrauterine system (IUS). This is a specific type of IUCD which releases a progestogen hormone into the womb. It can last for up to five years. Read about the intrauterine system (IUS).
Why would I choose long-acting reversible contraception?
Tillbaka till innehållLARCs are ideal for women who do not want a baby in the near future. This might be because you think you have completed your family and don't want more children, but want to keep your options open. Or it might be because you are young and not wishing to have children for some years to come. Or because you don't want children at all. Or because you are not currently in a position to have children, because of your job, relationship or finances. The great thing about LARCs is the word "reversible" - so if your situation changes, you can stop using them and become fertile again.
You don't need to take a tablet every day, so for most LARCs, you can forget about contraception for years at a time. This makes them more reliable (as they don't need you to remember, other than when they are due to be replaced).
The main downside is that they all require a small procedure of some sort. However, this does not have to be done very often, and provides long-term, reliable contraception once you have done it.
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Which LARC should I choose?
Tillbaka till innehållThis is an individual choice. Different people will prefer different options. Pros and cons of each are weighed up in the separate leaflet called Contraception Methods, and there is plenty of information about each in their individual leaflets as linked above.
Patient picks for Long-acting reversible contraceptives

Sexuell hälsa
Intrauterine contraceptive device
An intrauterine device (IUD) is a small device made from plastic and copper which sits inside the womb (uterus). It is also known as the coil.
av Dr Rosalyn Adleman, MRCGP

Sexuell hälsa
Levonorgestrel intrauterine device
The levonorgestrel intrauterine device (LNG-IUD), previously known as the intrauterine system (IUS) is a small, flexible, plastic device which sits inside the womb (uterus). There are two threads attached to it which pass out through the neck of the womb.
av Dr Toni Hazell, MRCGP
Vanliga frågor
What is the primary benefit of choosing long-acting reversible contraception over other methods?
The main benefit of LARCs is their reliability, as you don't need to remember to take a pill every day. Once in place, they provide contraception for years, meaning you can largely forget about it for extended periods.
How long does each type of LARC protect against pregnancy?
The contraceptive implant lasts for three years. The contraceptive injection needs to be given every three months (or two months for one brand). The intrauterine contraceptive device (IUCD) can stay in for up to ten years, and the intrauterine system (IUS) can last for up to five years.
Can I have children after using long-acting reversible contraception?
Yes, LARCs are 'reversible'. This means that if your circumstances change and you decide you want to have children, you can stop using them and become fertile again.
Are there any minor procedures involved with these types of contraception?
Yes, all LARCs require some form of minor procedure. For example, the implant is inserted under the skin, injections are given for the contraceptive injection, and the IUCD and IUS are fitted inside the womb. However, these procedures are not needed very often.
How often do I need to get the contraceptive injection?
The contraceptive injection is typically administered every three months, although one brand requires an injection every two months.
Are 'the coil' and the IUCD the same thing?
Yes, 'the coil' is another common name for the intrauterine contraceptive device (IUCD). It is called this because some of the original devices in the 1960s were coil-shaped.
Vidare läsning och referenser
- Long-acting reversible contraception; NICE Clinical Guideline (October 2005 - updated July 2019)
- Trussell J; Preventivmedel misslyckande i USA, Preventivmedel, 2011
- Intrauterine Contraception; Faculty of Sexual and Reproductive Healthcare Clinical Effectiveness Unit (March 2023 - last updated July 2023)
- UK Medical Eligibility Criteria Summary Table for intrauterine and hormonal contraception; Faculty of Sexual and Reproductive Healthcare, 2016 - amended September 2019
- Contraception - Progestogen-only methods; NICE CKS, September 2022 (UK access only)
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About the authorView full bio

Dr Mary Harding, MRCGP
General Practitioner, Medical Author
BA, MA, MB, BChir, MRCGP, DFFP
Dr Mary Harding qualified from Cambridge University medical school in 1989.
About the reviewerView full bio

Dr Colin Tidy, MRCGP
General Practitioner, Medical Author
MBBS, MRCGP, MRCP (Paediatrics), DCH
Dr Colin Tidy is an NHS Doctor, based in Oxfordshire.
Artikelhistorik
Informationen på denna sida är skriven och granskad av kvalificerade kliniker.
Next review due: 9 Feb 2028
10 Feb 2023 | Senaste versionen
30 okt 2017 | Ursprungligen publicerad
Författad av:
Dr Mary Harding, MRCGP

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