Yes, Liletta is a hormonal IUD. It contains 52 mg of levonorgestrel, a synthetic form of progesterone, which it releases in small daily doses directly into the uterus. It is FDA-approved for up to 8 years of pregnancy prevention.
How Liletta’s Hormone Works
Liletta sits inside the uterus and continuously releases levonorgestrel at a local level, meaning the hormone concentrates where it’s needed rather than circulating through your entire body the way a birth control pill does. The device starts by releasing roughly 19.5 micrograms per day, a tiny fraction of the 52 mg total stored in the device. That rate gradually decreases over time: about 17 mcg/day after one year, 14.8 after two years, and down to 9.8 mcg/day by year five.
This slow, steady release prevents pregnancy through several overlapping mechanisms. The hormone thickens cervical mucus, creating a barrier that blocks sperm from reaching an egg. It also impairs sperm’s ability to move and function normally. Additionally, it thins the uterine lining, making it less receptive to a fertilized egg. No single one of these effects has been identified as the primary driver; they work together.
How Effective Liletta Is
Liletta is one of the most effective contraceptives available. In clinical trials, the failure rate was 0.15 pregnancies per 100 women in the first year and 0.20 per 100 women-years through five years. The cumulative pregnancy rate over five years was 0.92%, meaning fewer than 1 in 100 users became pregnant over that entire period. For context, that’s comparable to surgical sterilization.
Effects on Your Period
Because levonorgestrel thins the uterine lining, most Liletta users notice lighter periods over time. About 19% of users stop getting a period entirely by the end of the first year. This isn’t harmful. It simply means the lining has become too thin to produce noticeable bleeding each month. Many people consider this a benefit, though the adjustment period during the first three to six months can involve irregular spotting or unpredictable bleeding before things settle down.
How Long Liletta Lasts
Liletta is currently FDA-approved for up to 8 years of continuous use, making it one of the longest-lasting reversible contraceptives on the market. The device should be removed by the end of the eighth year. Fertility typically returns quickly after removal, since the hormone’s effects are local and wear off once the device is out.
Liletta vs. Mirena
The most common comparison is between Liletta and Mirena, since both are 52 mg levonorgestrel IUDs with very similar designs. Mirena’s initial release rate is 20 mcg/day; Liletta’s is 18.6 mcg/day. In practice, these are pharmacologically near-identical. The key difference is cost. Liletta was developed through a partnership between a pharmaceutical company and a nonprofit specifically to be a more affordable option. If your insurance doesn’t fully cover an IUD, or you’re paying out of pocket, Liletta is generally the less expensive choice between the two.
Both devices use the same hormone at the same total dose in the same type of T-shaped frame (32 mm by 32 mm for Liletta). Side effect profiles are similar, and amenorrhea rates at one year are nearly the same: about 19% for Liletta and 18.4% for Mirena.
How It Compares to Non-Hormonal IUDs
The copper IUD (Paragard) is the only non-hormonal IUD available in the United States. It uses copper ions instead of a hormone to prevent pregnancy, which means it won’t lighten your periods. In fact, copper IUDs tend to make periods heavier and crampier, especially in the first several months. If avoiding hormones entirely is a priority for you, the copper IUD is the IUD option that achieves that. If lighter periods or eventual period suppression sounds appealing, a hormonal IUD like Liletta is the better fit.
Liletta also differs from lower-dose hormonal IUDs like Kyleena (which contains 19.5 mg of levonorgestrel) and Skyla (which contains 13.5 mg). These smaller-dose devices release less hormone daily, which means they’re less likely to stop your period but are approved for shorter durations. Liletta’s higher hormone load is what allows it to remain effective for up to 8 years.