Contraceptivos reversíveis de longa duração
LARCs
Revisado por Dr Colin Tidy, MRCGPÚltima atualização por Dr Rosalyn Adleman, MRCGPLast updated 10 Fev 2023
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Nesta série:Implante contraceptivoInjeção contraceptivadispositivo contraceptivo intrauterinodispositivo intrauterino de levonorgestrel
Os contraceptivos reversíveis de longa duração são métodos de controle de natalidade muito eficazes. Quando você usa um desses, não precisa se lembrar de algo todos os dias. Eles duram entre 2 meses e 10 anos, dependendo da opção utilizada. Podem vir na forma de injeções, implantes e também dispositivos que são colocados no seu útero.
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.
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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 implante contraceptivo.
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 injeção contraceptiva.
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.
O sistema intrauterino (SIU). 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 sistema intrauterino (SIU).
Why would I choose long-acting reversible contraception?
Voltar ao conteúdoLARCs 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?
Voltar ao conteúdoThis 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 Contraceptivos reversíveis de longa duração

Saúde sexual
Implante contraceptivo
Um implante contraceptivo é um dispositivo que é colocado sob a pele para oferecer uma dose constante de contracepção sem que você precise tomar uma pílula diariamente.
por Dr. Toni Hazell, MRCGP

Saúde sexual
Injeção contraceptiva
A injeção contraceptiva contém um hormônio progestagênio. É usada para prevenir a gravidez.
by Dr Caroline Wiggins, MRCGP
Perguntas frequentes
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.
Leitura adicional e referências
- Contracepção reversível de longa duração; Diretriz Clínica NICE (Outubro 2005 - atualizada em Julho 2019)
- Trussell J; Falha contraceptiva nos Estados Unidos, Contracepção, 2011
- Contracepção Intrauterina; Unidade de Eficácia Clínica da Faculdade de Saúde Sexual e Reprodutiva (março de 2023 - última atualização julho de 2023)
- Tabela Resumo dos Critérios de Elegibilidade Médica do Reino Unido para contracepção intrauterina e hormonal; Faculdade de Saúde Sexual e Reprodutiva, 2016 - emendado em setembro de 2019
- Contracepção - Métodos somente com progestógeno; NICE CKS, setembro de 2022 (acesso apenas no Reino Unido)
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About the authorView full bio

Dra. Mary Harding, MRCGP
Médico Generalista, Autor Médico
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
Médico Generalista, Autor Médico
MBBS, MRCGP, MRCP (Paediatrics), DCH
Dr Colin Tidy é um médico do NHS, baseado em Oxfordshire.
Histórico do artigo
As informações nesta página são escritas e revisadas por clínicos qualificados.
Próxima revisão prevista para: 9 de fevereiro de 2028
10 Fev 2023 | Última versão
30 Out 2017 | Publicado originalmente
Escrito por:
Dra. Mary Harding, MRCGP

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