Levonorgestrel intrauterine system cost effective for contraception.

Discusses research being done on the cost effectiveness of levonorgestrel intrauterine system, etonogestrel subdermal implant, and medroxyprogesterone injection for long-term hormonal contraception in Great Britain. Reference to a study by S. J. Varney et al, published in a 2004 issue of the "PharmacoEconomics"; Expected annual number of pregnancies for each contraceptive option; Total direct per-patient cost of medical care.