Hormonal coil (IUS)

Mirena

What the packet says

What is it?

Hormonal ingredients
What’s it made of?

Mirena is made of a small white T-shaped frame made from a plastic called polyethylene. The hormone is contained within a silicone substance called polydimethylsiloxane, which is surrounded by a membrane (skin) also made of polydimethylsiloxane. The T-shaped frame also contains barium sulphate so that it can be seen on X-rays. There are two fine brown threads, made of iron oxide and polyethylene, attached to the bottom of the frame.

How it works

The Hormonal coil is a small, T-shaped plastic device that is inserted into your womb by a doctor or nurse. It releases the hormone progestogen gradually into your womb which prevents pregnancy by making the fluid in your cervix thicker (which makes it more difficult for sperm to enter the womb), and preventing the lining of your womb thickening enough for an embryo to grow in it. Sometimes it can also stop you ovulating.

How does this compare?

Frequency

  • During intercourse
  • Daily
  • Monthly
  • 1 - 3 Months
  • 1 - 3 Years
  • 3 - 5 Years
  • Permanent

Similar to

Clinical effectiveness

99.8% if used perfectly

What does this mean?

Contains hormones

  • Yes
  • No
What does this mean?

What you said

These stats are based on 202 reviews

Side Effects

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After Effects

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Moods & Emotions

Periods

Body Weight

Sex Drive

Reviewer data

Time Taken

Age of Reviewers

Reviewers had children

Reviewers currently using

Detailed information

How to get started

Women ask us lots of questions about getting a coil fitted – so we’re working on everything you ever wanted to know about the coil to help cover everything. If you want anything in particular covered, please contact us at info@theldown.com. In the meantime, we’ve summarised a few key points below:

 

  • To get a coil fitted you need to go to a GP surgery or sexual health clinic where some staff are trained to fit them. You can contact your GP and ask if they fit coils, or search for clinics that fit coils here.
  • The coil can be fitted at any time during your monthly period cycle, as long as you’re not pregnant (although you may prefer to get it fitted when you’re not on your period).
  • Your doctor or nurse will do some tests to make sure that you can have the coil – like making sure that you’re not pregnant and checking for infections or STIs.
  • Your doctor or nurse will use a speculum (like when you have a smear test) to open up your vagina and then insert the coil through the cervix into the womb. Most women find this uncomfortable.
  • If it’s fitted in the first seven days of your cycle, you’ll be protected against pregnancy straight away. If it’s fitted at any other time, you’ll need to use condoms or other contraception, for seven days afterwards.
  • You will normally go back for a check up 3-6 weeks after getting it fitted.

How to stop

  • Your coil can be removed at any time by a trained doctor or nurse. It’s simpler than having it fitted – they will use a  gently pull on the threads and the T shape folds up and it can be pulled out of the womb.
  • If you’re not having another coil put in and don’t want to get pregnant, you’ll need to make sure you don’t have sex seven days before you have it removed, or use condoms or another method.
  • Check out our survey results to see how long it took most women’s cycles to return to their definition of ‘normal’ and read up about other after effects they’ve experienced.

Things that can go wrong

  • There’s a small risk of infection after it’s been fitted. This may occur when harmless bacteria normally found in vagina are pushed inside the womb. You’ll know it’s infected if you have unusual discharge, there’s a strong smell, or you develop a high temperature or chills.
  • Around 1 in 20 coils can fall out or be pushed out by the womb, this is most common in the first few weeks of getting it fitted, or during a period. If this happens, head to your doctor or nurse to get a check up.
  • If the coil doesn’t work and you get pregnant, there’s also a small increased risk of ectopic pregnancy – when the egg implants outside the womb, normally the fallopian tubes. However, the overall risk of ectopic pregnancy is less in women using a coil than in women using no contraception at all.
  • Very occasionally the threads get lost. This happens to about 1 in 100 women, and is more commonly caused by the threads being pulled up inside into the cervix. They may notice this when you go to have the coil removed, and sometimes the threads can reappear naturally.
  • Even more occasionally (1 in 1000 chance) the coil goes through the wall of the womb into the abdomen. This is called ‘perforation’ and it this happens, they can remove the coil via surgery.

Reviews

Hormonal coil (IUS)

- Mirena

Very quick pain free insertion. Slightly cramping in stomach afterwards but nothing unbearable. Only main negative was that it …

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Hormonal coil (IUS)

- Mirena

Made pmt symptoms a lot worse. Low mood, anxiety, negative mood, tiredness. Loss of sex drive. Bloating.

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Hormonal coil (IUS)

- Mirena

After first 6 months I developed weird bumps on my arms which after biopsy turned out to be sarcoidosis an autoimmune disease. …

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Hormonal coil (IUS)

- Mirena

After having trouble using the combined pill I decided to try the Mirena coil. The procedure when getting the coil was extremel…

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Hormonal coil (IUS)

- Mirena

Sadly for me I had almost daily excruciating pains and myself and my partner could feel the coil moving during sex. If I didn…

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Hormonal coil (IUS)

- Mirena

With the first mirena coil I had I didn’t really get any negative symptoms just towards the end before I had it changed I…

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Hormonal coil (IUS)

- Mirena

Had my first Mirena coil 20 years ago had it removed 15 years ago to have daughter then after she was born straight back in..us…

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Hormonal coil (IUS)

- Mirena

Although my periods were much lighter and manageable (I have Adenomyosis) the intense migraines were not

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Hormonal coil (IUS)

- Mirena

I have had a great experience with Mirena so far. Had it inserted under general anaesthetic (was completely covered by private …

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