The decision of which coil to choose is entirely yours. As well as the above information, our nursing sister Anna has some more information in this video, which can help you decide.
There are two choices of coil - the copper (IUD) and the hormonal (IUS)
The Copper Coil
The copper coil, also known as the copper IUD (intrauterine device), is a long-acting, reversible contraceptive method. It’s a small, T-shaped plastic and copper device that is inserted into the uterus by a healthcare professional to prevent pregnancy. The copper is toxic to sperm, stopping sperm from surviving in the uterus or fallopian tubes. It may also prevent a fertilised egg from implanting in the uterus. The copper coil does not contain hormones.
The copper coil is 99% effective, and lasts up to 10 years. It is safe to use while breastfeeding, and your fertility returns to normal immediately once it is removed.
An IUD is very safe, but there are some rare risks, including pelvic infections (usually within 3 weeks of having an IUD fitted); your IUD moving or coming out (usually within 3 months after it’s fitted); damage to the womb ectopic pregnancy in the rare case that your IUD fails. You may experience some side effects, such as heavier periods and bleeding between periods.
The copper coil can be used as a method of emergency contraception.
Find out more about the copper coil here.
The Hormonal Coil
An IUS (intrauterine system), also called a hormonal coil, is a small plastic T-shape that a doctor or nurse puts into your womb (uterus). It stops pregnancy by releasing the hormone progestogen into your womb. An IUS is over 99% effective and lasts for 3 to 8 years, depending on the type. An IUS is safe to use while breastfeeding and can usually be fitted soon after giving birth. After an IUS is removed your fertility returns to previous levels straight away. An IUS can make periods lighter, shorter, and less painful.
Side effects of an IUS (intrauterine system), also called a hormonal coil, are most common for a few months after having it fitted. Many IUS users do not get any side effects.
Possible side effects include period-like pain and bleeding (spotting) after having an IUS fitted; small fluid-filled sacs (cysts) on your ovaries. These are usually harmless and disappear without treatment; and a small chance of getting thrush that keeps coming back – talk to your GP if this happens
Some people report headaches, acne, sore breasts, and mood changes.
You can find out more about the IUS here
If you're thinking of getting a coil fitted with us, please take a look at the below information and videos.
Choosing your coil
Side effects
Testing for STIs before your coil fit
You need to be sure that you do not have a sexually transmitted infection before a coiI fit/exchange. You should have a test if you are under the age of 25, had sex with someone new in the last 3 months, or have had more than one sexual contact in the last year. You don’t need to test if you have had a negative chlamydia test after these risks.
Preparing for your coil fit or exchange
Please view the self-assessment checklist to help you to decide if you are ready to have a coil fitting/exchange.
Click here to download the self-assessment checklist.
Removing your coil
To have your coil removed, you'll need to book an appointment.
You need to abstain from sex or use condoms 7 days before the removal.
If your coil is out of date, please ensure you are using reliable alternative contraception.
Frequently Asked Questions
Some of the other FAQs we receive that are not covered above are:
Will my partner feel the threads?
Your coil will be fitted up inside your womb, so neither you nor your partner will be able to feel your coil. The coil strings or threads will be sitting just outside of your cervix. They will be around 2-3cm long. These are there so that you can feel for them and be reassured our coil is still in the right place. They are also what we gently pull on to remove your coil. Your partner may feel them at first during sex, they will not hurt them. Within a few weeks, these threads will have softened and tucked themselves away, so your partner will not feel them.
Is it safe to use tampons or menstrual cups?
Yes - it is possible that using a menstrual cup may increase the risk of a coil being expelled so make sure that the menstrual cup is put in the correct place and not too high in the vagina. Take care not to pull on the IUS threads when you’re removing tampons or a menstrual cup.
Can I carry on my day as normal after having my coil fitted?
You should expect some cramping and bleeding after having your coil fitted, but most people do feel well enough to work and drive after. However, a small number of people can feel lightheaded, sick or dizzy after a coil fit.
We advise everyone to make sure they have someone that can pick them up from the clinic if they don’t feel well enough to drive/travel home alone. Listen to your body - this is a procedure so you may wish to make alternative plans for the rest of your day.
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28th August 2025