There are two main types of IUDs:
- Copper IUD - without hormones
- Hormonal IUD - contains a progesterone-like hormone (no estrogen)
- Hormonal IUDs do not affect the risk of blood clots or stroke.
Copper IUD
How it works:
- The copper makes it difficult for sperm cells to move.
- The lining becomes less receptive to a fertilized egg.
Advantages:
- Completely hormone-free
- Can remain in place for up to 5 years (often longer if inserted at age 44-45)
Disadvantages:
- Increases menstrual bleeding by 25-50%
- Can cause more menstrual pain -> Best suited for women who already have little bleeding and little pain.
Gynefix
A copper IUD intended to cause less increase in bleeding
Difficult to access; few gynecologists offer insertion. We at Dybwadsgynekologene do not insert it.
Duration: 5 years
Hormonal IUD
Contains a progesterone-like hormone in a very low dose (much lower than birth control pills).
How it works:
- Makes the uterine lining thin -> difficult for an egg to attach
- Makes the environment unfavorable for sperm cells
- Causes less bleeding
Common side effects (especially during the first 3 months):
- Bloating
- Breast tenderness
- Mood swings
- Frequent spotting (can last 3-5 months)
- 1-4% have persistent spotting
- Some experience reduced sexual desire
- Still, the hormonal IUD is the contraceptive method with the highest number of satisfied users.
Differences between the hormonal IUDs
Mirena (highest dose) - lasts 8 years
Approx. 30% do not bleed at all
The rest bleed little and sporadically
Blocks ovulation in 70-80% during the first 2-3 years
Best for heavy and painful menstruation
Can be slightly large for women who have not given birth (10-15% experience discomfort)
Kyleena (medium dose) - lasts 5 years
Approx. 25% have no bleeding
Most bleed little and sporadically
Affects ovulation in approx. 10% (only during the first year)
Lower risk of cysts
Smaller in size -> well suited for women who have not given birth
Jaydess (lowest dose) - lasts 3 years
Approx. 16% have no bleeding
Does not affect ovulation
Same size as Kyleena
Lasts shorter than Kyleena -> Kyleena is therefore recommended more often.
IUD insertion
Best time: day 5-7 of menstruation
Less discomfort
Certainty that you are not pregnant
Lower risk of spotting over time
A copper IUD costs NOK 800 here, and hormonal IUDs cost NOK 1800. A prescription can be sent electronically if you already know which one you would like to try. You can buy a copper IUD without a prescription at the pharmacy.
Practical:
- If you are not already using another form of hormonal contraception, send an SMS, email, or call on the first day of your period.
- It may take a few cycles before you get an insertion appointment
Take painkillers before insertion:
- 1 Ibux 400 mg + 2 Paracet 500 mg
- Eat a little after Ibux
Safety
All IUDs are very reliable contraceptive methods. If you suspect pregnancy, take a pregnancy test.