Everything You Need to Know Before Your Appointment
IUD (Coil) Frequently Asked Questions
Can I have an IUD fitted while on my period?
Yes. It’s completely safe to have an IUD fitted during your period. In fact, it can sometimes make fitting easier. There’s no need to cancel or reschedule your appointment.
What’s the difference between a copper IUD and a hormonal IUD?
The copper IUD (Cu-IUD) is hormone-free and works by preventing sperm from fertilising the egg. It starts working immediately and can also be used for emergency contraception. It usually won’t affect your natural cycle.
The hormonal IUD (IUS)—such as Mirena, Levosert, Kyleena, or Jaydess—releases a low dose of progestogen. This thickens cervical mucus and thins the womb lining, often making periods lighter. It takes 7 days to become fully effective and may also be used for heavy periods or HRT.
When can I have an IUD fitted?
IUDs can be fitted at any point in your cycle, as long as there’s no risk of pregnancy. Please avoid unprotected sex from your last period until your appointment.
Do I need any tests before getting an IUD?
If there’s a chance you may have a sexually transmitted infection (like chlamydia or gonorrhoea), please contact your GP or local sexual health clinic. If you’re over 45 or have irregular/heavy bleeding, additional testing may be needed—your GP can arrange this.
What happens at the fitting appointment?
You’ll meet with a clinician who’ll go through your medical history, explain the procedure, and answer questions. A healthcare assistant may also be present. After a brief examination, the IUD is fitted. The whole visit takes about 30 minutes, and local anaesthetic is available if needed.
What should I expect after the fitting?
You might feel some cramping or light bleeding. Most people feel better after a day or two, and simple pain relief like paracetamol or ibuprofen can help.
What are threads and how do I check them?
IUDs have thin threads that sit just at the top of the vagina. We recommend checking for them 4–6 weeks after insertion. If you can’t feel them, contact your GP and use extra contraception until it’s checked.
How long does an IUD last?
Copper IUDs: Typically effective for 5–10 years. If fitted after age 40, they can last until menopause.
Hormonal IUDs: Last 3–6 years depending on the type. If used for HRT, they should be replaced every 5 years.
When should it be removed?
You can have your IUD removed at any time by contacting your GP. If you’re nearing expiry and not replacing it, avoid sex or use condoms for 7 days beforehand to prevent pregnancy.
Who can use an IUD?
Most people with a uterus can safely use an IUD—even if you haven’t had children. Your clinician will review any health conditions to make sure it’s suitable for you.
Can I use tampons or a menstrual cup?
Avoid using tampons or cups for the first 2 weeks after fitting. After that, they’re safe—but be gentle during removal to avoid dislodging the device.
Will it affect my fertility?
No. Fertility returns to normal once the IUD is removed. That’s why we advise avoiding sex for 7 days before removal, in case of immediate return to fertility.
Can the IUD fall out or move?
It’s rare, but possible. About 1 in 1000 insertions result in perforation, and around 1 in 20 may be expelled. That’s why we ask you to check your threads after fitting and seek help if you experience discomfort, pain, or unusual bleeding.
Preparing for Your Appointment
Avoid unprotected sex from your last period until your appointment.
Continue your current contraception until advised otherwise.
If you’re coming in for a replacement, use condoms or avoid sex for 7 days prior.
If your current contraception is expired, avoid sex or use condoms for 3 weeks before the appointment.
On the day:
Have a light meal, take paracetamol or ibuprofen (if safe for you), and bring something to help you relax. Let us know if you’re anxious—we’re here to support you and will always respect your comfort.
After your appointment:
Take it easy for the rest of the day. Pain relief and a hot water bottle can help with cramps. Avoid tampons and menstrual cups for 3–4 weeks. Check your threads after 4–6 weeks. If you had a hormonal IUD, use condoms or avoid sex for 7 days following insertion.