levonorgestrel lng iud special

The levonorgestrel (LNg) intrauterine device (IUD) releases small amounts of levonorgestrel, a form of progesterone, into the uterus each day. This type of IUD reduces cramping and heavy menstrual bleeding. And it is a highly effective method of birth control. Hormonal IUDs prevent pregnancy for 3 to 5 years, depending...