The levonorgestrel (LNg) intrauterine device (IUD) releases small amounts of levonorgestrel, a form of progesterone, into the uterus each day. In addition to reducing cramping and heavy menstrual bleeding, this type of IUD is a highly effective method of birth control.

Unlike other IUDs, the levonorgestrel IUD may decrease the risk of pelvic inflammatory disease (PID). It must be replaced every 5 years to ensure that hormone release continues at a level that helps you.

How effective is it?

Most women experience a significant decrease in uterine blood loss with the LNg IUD. Some studies report up to a 97% reduction in blood loss after 12 months.¹ Increased spotting during the first couple of months is common, followed by less bleeding thereafter.

When compared to women who had a hysterectomy to treat dysfunctional uterine bleeding, women using the LNg IUD report similar satisfaction with their treatment and with their health-related quality of life after 12 months.²

What are common side effects?

Common progestin/levonorgestrel-related side effects include bloating, weight gain, and breast tenderness.

Possible changes in the menstrual cycle caused by the LNg IUD include:²

• Absence of menstrual periods (amenorrhea).
• Irregular, though not usually heavy, menstrual bleeding.
• A temporary increase in menstrual bleeding (including menstrual days and bleeding between periods). This side effect usually subsides after the first couple of months of use.