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coil fitting: What you need to know

Please read this information carefully when you book your coil fitting.

It is important that you read the information below when you book your appointment and then again before you attend your appointment to have a coil fitted.

If you are worried or have questions, you can call the clinic or speak to the nurse/doctor before the fitting, and it’s ok if you change your mind.

If you need to change or cancel your appointment, please contact the clinic as soon as possible. Contact details for all Brook clinics can be found in our service finder: brook.org.uk/find-a-service.

Important information

Please make sure you have read and understand the information below before you attend your coil appointment.

Contraception, pregnancy and STIs

It is very important that there is no chance of you being pregnant when you have your coil fitted (or re-fitted).

  1. Use condoms every time you have sex for three weeks before your coil fitting. If you have had unprotected sex (sex without a condom or contraception) in the three weeks before you coil appointment, the nurse or doctor will not be able to fit your coil.
  2. The ‘withdrawal method’ (pulling out) and natural family planning do not count as contraception ahead of a coil fitting.
  3. If you are already using a method of contraception, keep using it up until your fitting. This means you should keep taking your pill or using your patch, have the coil inserted before your injection runs out, or keep your implant until after the fitting. It is safe to have both methods at the same time. You may need to keep using your current method for up to seven days after your fitting, too, so make sure you tell the nurse/doctor if you are running out of pills or patches.
  4. If you think that your method of contraception may have failed (e.g. if the condom broke of you missed a pill) make sure you tell the nurse/doctor before they start your coil fitting.
  5. You may need to do a pregnancy test when you attend clinic, so please be prepared to provide a urine sample. If you do not do a pregnancy test when asked by the nurse/doctor, they may not be able to fit your coil.
  6. You shouldn’t have the coil fitted if you are at risk of having a sexually transmitted infection (STI). STIs are usually passed on through unprotected (without a condom) sex. Make sure you do an STI test before your appointment if you have had a new sexual partner since your last test. You can ask for a test at your local clinic or see if you can order one to do at home.
  7. The hormonal coil may not be effective at preventing pregnancy straight away and you might need to avoid sex or use another method of contraception for the first seven days after your fitting. Condoms are a good idea – if you need some you can ask at the clinic and they’ll give you some for free. If you are having a non-hormonal coil, it will be effective immediately.

At the start of the appointment, the nurse/doctor will ask you to confirm:

  • I have followed the advice about contraception and not having sex ahead of my coil fitting and have not had unprotected sex within the last three weeks.
  • I understand that the nurse/doctor will not fit the coil if they are concerned that I may be pregnant.
  • I understand that I should not have the coil fitted if I am at risk of a sexually transmitted infection (STI), and if I might be at risk I will tell the nurse/doctor.
  • If having a hormonal coil: I understand that the hormonal coil might not prevent pregnancy immediately and agree to use another form of contraception, like condoms, or to not have sex for seven days after the fitting if advised.
  • I understand that the coil will not protect me from STIs if I have unprotected sex in the future.

Coil risks

There are risks involved in all medical procedures. Please make sure you understand the below risks associated with the hormonal and non-hormonal coil. You can ask the doctor/nurse to explain in more detail at your appointment if you want to.

  1. No method of contraception is 100% effective. Both the hormonal and non-hormonal coil have a very small risk of failure (less than 1 in 100 chance of pregnancy).
  2. In the unlikely event that you do get pregnant with a coil, there is a risk that it may be an ectopic (outside the womb) pregnancy.
  3. There is a 1 in 1000 risk of the coil making a hole in the womb (perforation of the womb) at the time of insertion.
  4. There is a 1 in 20 chance of the coil falling out.
  5. There is a 1 in 100 risk of infection after the coil fitting.
  6. It is possible that your bleeding pattern (periods) will change and that you may experience no periods, heavier bleeding, irregular bleeding or prolonged bleeding after the coil fitting.

At the start of the appointment, the nurse/doctor will ask you to confirm:

  • I understand that the coil is not 100% effective at preventing pregnancy.
  • I understand that, if I got pregnant with a coil, it may be an ectopic (outside the womb) pregnancy.
  • I understand that is a chance of the coil falling out.
  • I understand that there is a small risk of infection after the coil fitting.
  • I understand that there is a rare risk of perforation of the womb at the time of a coil insertion.
  • I understand that the coil may affect my periods and I may see changes to my bleeding pattern or have no periods.
  • I agree to seek medical care if I can’t feel the threads of the coil, I have symptoms of an infection (pain, temperature etc.), or I am worried that there is something wrong with my coil.

Preparing for your appointment

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Make sure that you have had breakfast/lunch on the day of your appointment, and that you are well hydrated (have had enough to drink). Don’t drink alcohol or take drugs before your appointment.

As the coil needs to be put into the womb via the vagina, having one fitted isn’t the nicest experience; it can feel invasive and uncomfortable, and some people will find it painful. The nurse/doctor will do their best to make you comfortable and will keep checking to make sure you are ok. Remember: they’ve done this lots of times so you don’t need to feel embarrassed.

A painkiller can be taken around an hour before your appointment – this is usually enough pain relief for most people. You can request a local anaesthetic, but not all services will be able to offer this so if you want one it’s best to check before you make your booking.

You might want to think about some relaxation techniques to help you stay calm and your muscles relaxed during the fitting. You can also request that a second member of staff is present during the fitting to support you – they can chat to you and/or (if you’re both comfortable with it) hold your hand.

If you have any questions about the coil or about the fitting procedure, make a note of these and make sure you ask the nurse/doctor before they start the procedure.

Be sure to follow any other guidance given to you at the time of booking you appointment.

If you want to bring someone with you to your appointment, please call the clinic beforehand to let them know. If you do bring someone with you, it’s important to understand that there might be times where the nurse/doctor has to ask you sensitive or personal questions – you might want the other person to leave the room whilst you answer these.

FAQs

The pain of a coil fit can vary from person to person. To prepare, consider taking paracetamol beforehand and ibuprofen afterward for pain relief. A hot water bottle can help soothe any cramping, and having a friend for support can make the experience more comfortable.


Many people find it helpful to take the afternoon off work or school to rest and recover. You might experience some cramping, bleeding, or other side effects that can be similar to a heavy period.

No, you don’t only have to get a coil fitted during your period. While it’s a common time for fitting, it can be done at any point in your menstrual cycle as long as you’re not pregnant. However, fitting during your period, especially on lighter flow days, can sometimes be slightly more comfortable due to the slightly open cervix.

After your coil fitting

It’s important to look after yourself. Take it easy for the rest of the day (try to avoid any vigorous exercise) and if you have any pain or cramps you can use painkillers. A hot water bottle on your tummy can also help.

Make sure you know when your coil is due to expire. This will usually be in either five or 10 years. It might be good to add a reminder to your calendar.

If you have any worries about the coil, you can get back in touch with Brook and a nurse/doctor will be able to support you.

If you think you may have an infection or feel unwell, you should seek medical advice immediately.

Remember: you may see changes to your periods after having a coil fitted.

FAQs

When you feel ready, although it is generally recommended to wait for at least three days after having a coil fitted before having sex. This allows time for the cervix to heal and reduces the risk of infection. If you have a copper coil (IUD), it will be effective at preventing pregnancy immediately. If you have a hormonal coil (IUS), it will be effective immediately if it is fitted on the first day of your period. If it is fitted at any other time, you will need to use an additional form of contraception for the first seven days. It is important to note that coils do not protect against sexually transmitted infections (STIs).


It’s normal to experience some pain and discomfort after a coil fitting. To ease these symptoms, try resting, taking over-the-counter pain relievers like ibuprofen or paracetamol, applying heat to your lower abdomen, and practicing relaxation techniques.

However, if you experience severe cramping that doesn’t improve with pain relief, fever, unusual vaginal discharge, pelvic pain, heavy bleeding, or difficulty feeling the coil’s strings, contact your doctor or nurse immediately. They can assess your symptoms and provide appropriate treatment. You will receive an information leaflet which explains what to expect in terms of pain and bleeding, as well as an expiration card which explains when your coil will expire.

You can usually return to normal activities, including exercise, as soon as you feel comfortable. This typically happens within a few days after the coil fitting. However, it’s important to listen to your body and avoid strenuous activity if you’re still experiencing discomfort.

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