The levonorgestrel intrauterine system: long-term contraception and therapeutic effects.
The levonorgestrel intrauterine system (Mirena((R))) has been developed as a long-acting method of contraception. This medicated device, inserted into the uterus, delivers a small daily dose of a progestin, levonorgestrel, into the uterine cavity. It is one of the most effective methods of contraception and is approved in more than 100 countries for 5 years of use.
Population Council, 1230 York Avenue, New York 10021, USA. rsitrukware@popcbr.rockefeller.edu.
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