Liletta is FDA-approved for up to 8 years of pregnancy prevention. That makes it one of the longest-lasting IUDs available. If you’re using Liletta for contraception, it needs to be removed by the end of the eighth year.
How Liletta Works Over 8 Years
Liletta contains 52 mg of levonorgestrel, a synthetic form of progesterone. The device sits in your uterus and releases small amounts of this hormone directly into the uterine lining, where it thickens cervical mucus and thins the uterine lining to prevent pregnancy.
The hormone release isn’t constant over the full 8 years. It starts at about 20 micrograms per day when the IUD is first placed, then gradually tapers. By the end of year one, it’s down to roughly 17.5 mcg/day. By year three, about 13 mcg/day. By year six, around 8.6 mcg/day. Even at these lower levels, the device remains effective at preventing pregnancy because it works locally in the uterus rather than throughout your whole body.
Does It Stay Effective the Whole Time?
Yes. Clinical trials tracked Liletta users through all 8 years and found that the device maintains its contraceptive effectiveness for the entire approved duration. In two major studies, no pregnancies occurred during year 8. The cumulative pregnancy rate across the full 8 years was about 1 percent, which puts Liletta among the most reliable forms of birth control available.
For context, that failure rate is comparable to surgical sterilization. The gradual decline in hormone output doesn’t translate into reduced protection. You don’t need to worry about Liletta “wearing off” as it approaches its expiration, though you should not leave it in place beyond the 8-year mark.
What Happens at the 8-Year Mark
When your 8 years are up, the IUD needs to come out. If you still want long-term contraception, a new IUD can typically be placed during the same office visit as your removal. Removal itself is a quick in-office procedure that usually takes just a few minutes.
It helps to keep track of your insertion date so you can schedule a replacement appointment ahead of time. Your provider’s office likely has your placement date on file, and some people set a calendar reminder a few months before the 8-year mark to give themselves time to plan.
How Liletta Compares to Other IUDs
Liletta and Mirena both contain the same total amount of hormone (52 mg of levonorgestrel) and are the same general type of IUD. Mirena is also approved for up to 8 years of contraceptive use. The two devices are similar enough that clinical researchers have studied them together and found comparable long-term efficacy.
Smaller hormonal IUDs like Kyleena (approved for up to 5 years) and Skyla (approved for up to 3 years) contain less hormone and are approved for shorter durations. The copper IUD, Paragard, contains no hormones at all and is approved for up to 10 years, making it the longest-lasting option overall.
One practical difference worth noting: Liletta was developed as a more affordable option through a partnership between a nonprofit and a pharmaceutical company. If cost is a factor, it may be worth asking your provider or insurance plan about pricing differences between Liletta and Mirena, since the devices themselves are clinically very similar.
Changes You May Notice Over Time
Many Liletta users experience lighter periods or no periods at all, especially during the first few years when hormone output is highest. As the daily hormone release gradually decreases over time, some people notice their periods return or become slightly heavier than they were in the early years of use. This is normal and doesn’t mean the IUD has stopped working.
Spotting and irregular bleeding are most common in the first 3 to 6 months after insertion. After that initial adjustment period, bleeding patterns typically settle into something more predictable. If you’ve had very light or absent periods for years and suddenly notice a significant change in bleeding, it’s reasonable to check in with your provider, but minor shifts in flow are expected as hormone levels taper.