11/03/2026
The difference between the two most common intrauterine devices (IUDs) and what’s right for you.
A copper coil is a small T-shaped device placed in the uterus. It doesn’t release hormones. Instead, copper creates an environment in the uterus that’s hostile to s***m, so it prevents pregnancy. It can be effective for up to about 10 to 12 years, depending on the brand and it’s a good option if you’re looking for a long-acting method that doesn’t involve hormones. Because it’s hormone-free, some people may experience heavier or longer periods, especially in the first few months after insertion.
A hormonal coil also sits in the uterus, but it releases small amounts of a progestin hormone. This thickens cervical mucus to block s***m, thins the lining of the uterus, and can suppress ovulation in some people. It’s often effective for 3 to 7 years, depending on the specific product. Benefits can include lighter periods or even periods stopping altogether over time. Some people may experience side effects like mood changes, headaches or irregular bleeding, especially initially.
Choosing between them depends on factors like how long you want contraception to last, whether you’re okay with hormones, your menstrual preferences and your medical history. It’s always best to chat with a healthcare professional who can tailor advice to you.
If you’d like more detailed information, you can read:
Copper coil overview: https://www.letstalkaboutit.nhs.uk/contraception/coils
Or to book an appointment go to: https://lancashiregynaecologist.co.uk/contacts/
