When it comes to contraception, intrauterine devices (IUDs), commonly referred to as coils, offer a highly effective and long-term solution for women looking to avoid pregnancy. Despite their effectiveness, many women remain unsure about the differences between the various types of coils available. In this blog post, we will explore the different types of coils, how they work, their benefits, and potential side effects.
What is a Coil?
A coil is a small, T-shaped device that is inserted into the uterus by a healthcare professional. It provides contraception by either releasing hormones or using copper to prevent fertilisation. Coils are highly effective, with a success rate of over 99%, making them one of the most reliable forms of contraception available.
Types of Coils
There are two main types of coils available in the UK: the hormonal intrauterine system (IUS) and the non-hormonal intrauterine device (IUD).
1. Hormonal Coil (IUS – Intrauterine System)
The hormonal coil releases a small amount of progestogen (a synthetic form of the hormone progesterone) into the uterus. This hormone thickens the cervical mucus to prevent sperm from reaching the egg, thins the lining of the uterus to prevent implantation, and in some cases, suppresses ovulation.
Types of Hormonal Coils Available in the UK:
Mirena – Effective for up to five years, Mirena is often prescribed to help manage heavy periods as well as for contraception and can be the progestogen part of your HRT
Levosert – Similar to Mirena, this coil lasts for up to six years and is also used for managing heavy menstrual bleeding. This can also be part of your HRT.
Kyleena – A lower-dose hormonal coil that lasts up to five years, often chosen for its smaller size.
Jaydess – Lasting up to three years, Jaydess is another low-dose option designed for those who prefer a shorter-term hormonal method.
Benefits of the Hormonal Coil:
Can lighten or stop periods altogether, which is beneficial for those with heavy menstrual bleeding.
Provides long-lasting contraception with minimal effort.
Suitable for women who cannot tolerate oestrogen-based contraception (such as the combined pill).
May reduce period pain and symptoms of endometriosis.
Potential Side Effects:
Irregular bleeding or spotting in the first few months.
Hormonal side effects such as headaches, breast tenderness, or mood changes.
In rare cases, the coil can be expelled or displaced.
2. Non-Hormonal Coil (IUD – Intrauterine Device)
The non-hormonal coil, commonly referred to as the copper coil, works by releasing copper into the uterus, which creates an inhospitable environment for sperm, preventing fertilisation.
Types of Copper Coils Available in the UK:
TT380 Slimline – One of the longest-lasting IUDs, effective for up to ten years.
Nova-T 380 – A smaller copper coil suitable for women who have not given birth, lasting up to five years.
UT 380 Short – Designed for women with smaller uteruses or those who have never been pregnant.
Benefits of the Non-Hormonal Coil:
Does not contain hormones, making it a great option for those who experience side effects from hormonal contraception.
Provides immediate contraception upon insertion.
Can last between five and ten years, depending on the type.
Can be used as emergency contraception if inserted within five days of unprotected sex.
Potential Side Effects:
Can cause heavier, longer, or more painful periods, especially in the first few months after insertion.
There is a small risk of infection in the first 20 days after insertion.
In rare cases, it can be expelled or displaced.
Which Coil is Right for You?
Choosing the right coil depends on individual health needs, lifestyle, and personal preferences. The hormonal coil is often recommended for those who experience heavy or painful periods, while the non-hormonal coil is a good option for those who prefer to avoid hormonal contraception.
A healthcare professional can help assess your medical history and discuss the best option based on your needs. If you are considering a coil, it is essential to have a consultation with a Healthcare professional to understand the benefits and risks in relation to your health.
Insertion and Removal Process
Both types of coils require insertion by a trained healthcare professional. The procedure usually takes around 5-10 minutes and can cause mild discomfort or cramping. Pain relief, such as ibuprofen, can be taken beforehand to ease discomfort. Once inserted, a follow-up check may be recommended to ensure the coil is in place. We have Amy our specialist nurse here at Bristol Menopause clinic who does monthly Saturday coil clinics.
Removal is a straightforward process and can be done at any time by a healthcare professional. Fertility typically returns to normal immediately after removal.
The coil is a reliable and effective contraceptive option that suits many women. Whether you prefer a hormonal or non-hormonal method, understanding the differences between the types of coils can help you make an informed choice. If you are considering a coil, speak to a healthcare provider to determine the best option for your lifestyle and health needs.