What is Norplant System (levonorgestrel intrauterine system)?
Levonorgestrel is a female hormone. This hormone can cause changes in your cervical mucus and uterine lining, making it harder for sperm to reach the uterus and harder for a fertilized egg to attach to the uterus. Levonorgestrel intrauterine system is a plastic device that contains the hormone levonorgestrel. This device is placed in the uterus where it slowly releases the hormone to prevent pregnancy for up to 5 years. Levonorgestrel intrauterine system is meant for use in a woman who has had at least one child and is in a stable sexual relationship with someone who has no other sexual partners. Levonorgestrel is a progestin hormone and does not contain estrogen. The intrauterine device releases levonorgestrel into the uterus, but only small amounts of the hormone reach your blood stream. Levonorgestrel intrauterine system may also be used for other purposes not listed in this medication guide.