Coils are a very popular method of long lasting reversible contraception. Hormonal Intra uterine devices are also used to treat a variety of problems such as heavy periods and endometriosis and can be used for HRT as well. After you have a coil inserted, the coil threads, which are attached to the bottom tip-off the coil are cut. The threads are usually cut to 2-3 cm and come down through the cervix, sitting high in the vagina.
These threads allow you to check that your coil remains in place. They are also there so that your doctor can remove your coil when it is time to remove or replace it.
Although it is not common, your coil might be expelled from the uterus and may slip out either partially or completely. If this happens, it may not be working effectively. You may not experience any symptoms if this happens, so it’s important to check the threads regularly. Occasionally the threads can also curl up within the cervix or uterus- the coil itself will work if it is in the right place even if the threads have curled up in the cervix or uterus.
How to check your coil threads
Wash your hands. Either sit with your legs apart or squat.
Insert your index or middle finger into your vagina until you touch the cervix (which should feel like the tip of your nose)
There is a small dimple in the middle of the cervix and the threads should be coming out of that. It will feel like fishing line.The threads do become softer with time so they can sometimes be hard to feel.
If the IUD threads feel longer or shorter than the last time you checked, or you cannot feel them at all, then your IUD may have moved.
When should I check my IUD threads?
The best time to check your IUD threads is at the end of each period as the cervix will be lowest in the vaginal canal at this point of your menstrual cycle.
Try to check your IUD every four weeks after fitting as the first few months after insertion are the most common time for the coil to be expelled.
If you can’t feel your IUD threads you should check your pads/tampons/menstrual cup to ensure that it has not come out.
After the initial few months, you should check your IUD threads every few months.
What should I do if I think my IUD has moved?
If your IUD has moved it will need to be put back in place by a doctor or the coil may have to be replaced. Do not try to push the IUD back up into place. Make sure you use backup contraception until the coil location has been confirmed.
Contact your doctor. They may carry out an internal examination to see if the threads are visible or refer you for an Ultrasound scan or X-ray to locate the coil if the threads are not visible.