Intrauterine Contraception (coils)

There are two types of intrauterine contraception which we can fit, a hormonal (Levonorgestrel Intrauterine Device, LNG-IUD) and non-hormonal option (Copper Intrauterine Device, Cu-IUD). Both are often referred to as ‘coils’.

Intrauterine contraception is a very effective (8 in 1000 failure rate) reversible method of contraception, which can last for 5-10 years depending on the type. It is a small, T-shaped plastic device that is inserted into your womb (uterus) by a trained specialist. Once the coil is in fitted you do not have to think about it each day or each time you have sex.

At the clinic we will discuss your options with you and check that a coil is a suitable method of contraception for you.

LNG-IUDs act locally inside the uterus by releasing a very low dose of progestogen hormone to prevent pregnancy by altering the lining of the womb and cervical mucus and are effective 7 days after insertion. In some women ovulation (releasing of an egg) is also prevented. If fitted correctly, the LNG-IUD is over 99% effective and many women find they have fewer or lighter periods. There are very few people who are not suitable for this method of contraception.

The 52mg LNG-IUD is the most commonly fitted (Mirena, Benilexa, Levosert) and is effective for 8 years: FSRH CEU Statement: Mirena® 52mg LNG-IUD extension of licence for contraception to 8 years – Faculty of Sexual and Reproductive Healthcare.https://www.fsrh.org/Common/Uploaded%20files/documents/fsrh-ceu-statement-extended-use-of-all-52mg-lng-iuds-for-up-to-eight-years-for-contraception.pdf  For women aged 45 and over, a 52mg LNG-IUD can be fitted and left in until you reach menopause, or you no longer need contraception.

Copper IUDs have a toxic effect on sperm and egg preventing fertilisation and have an inflammatory effect on the endometrium. Copper in the cervical mucus also inhibits the passage of sperm. Copper coils can be kept in place for five to ten years depending on which one you have inserted and they don’t contain any hormones. The failure rate is extremely low and if fitted correctly, they are over 99% effective.

Remember, these methods of contraception are only effective in preventing pregnancy, to protect yourself against STIs and BBVs, condoms should also be used, which can be accessed for free via the Lanarkshire C Card Scheme.

Please note: sexual health clinics are staffed by both male and female clinicians, so we cannot guarantee a female doctor, however a female chaperone would always be present. If you wish to discuss this with staff prior to your appointment, please call the appointment line on 0300 303 0251.