What percentage of people get pregnant on Mirena?
John Castro
Published Feb 27, 2026
What percentage of people get pregnant on Mirena?
According to Mirena, which makes a hormonal type of IUD, fewer than eight out of 1,000 women (0.8 percent) become pregnant over five years using the device. Still, in rare cases, pregnancy can occur.
Does Mirena make you more fertile?
The short answer: The hormonal IUD (Mirena) doesn’t affect future fertility. The long answer: The Intrauterine Device (IUD) is a small contraceptive device that is inserted into the uterus. This hormonal IUD works more like other hormonal contraceptives (the pill or injection).
Can I get an IUD at 20?
Yep, teens can totally get IUDs. In fact, the American Academy of Pediatrics recommends IUDs as one of the best kinds of birth control for teens to get. That’s because they’re the best at preventing pregnancy and all you have to do is get one inserted and it sits there doing all the work for you for up to 3-12 years.
What is the failure rate of the Mirena?
MIRENA, when inserted according to the insertion instructions, has a failure rate of approximately 0.2% at 1 year and a cumulative failure rate of approximately 0.7 % at 5 years.
Does Mirena lose effectiveness over time?
Mirena, a plastic IUD which releases the hormone levonorgestrel to prevent pregnancy, is advertised as effective for five years, but is effective for at least seven years, according to the review published in the journal Contraception.
What makes an IUD less effective?
Its effectiveness rate is between 97 and 99 percent – higher than for oral contraceptives, condoms and spermicides. Clinicians are not always certain what causes an IUD to fail. Some reasons for failure include expulsion of the IUD (about 10 percent of women do this during the first year) and improper insertion.
Is it harder to get pregnant after IUD?
In general, the ability to get pregnant will immediately go back to whatever is normal for you. Since the IUD is local on the uterus, hormone production isn’t generally affected.
Does an IUD cause infertility?
Good studies find no increased risk of infertility among women who have used IUDs, including young women and women with no children. Whether or not a woman has an IUD, however, if she develops pelvic inflammatory disease (PID) and it is not treated, there is some chance that she will become infertile.
Can anything affect IUD effectiveness?
Drugs and herbal supplements can make Mirena less effective. Examples of these substances include some blood thinners, anti-anxiety drugs and anti-seizure medications. Anti-retroviral drugs, antibiotics and St. John’s Wort may also interact with Mirena.
Who got pregnant on Mirena?
Just ask freelance writer Amy Gibbings, who fell pregnant while on the Mirena (a type of IUD) and didn’t know about it. It almost cost her her life. About three months ago, she was camping with her boyfriend when “a deeper, harder penetration caused sudden, excruciating pain in my cervix”, she says.
Does Mirena become less effective?