Model List of Essential Medicines (18th Edition)
The Model List of Essential Medicines from the World Health Organization presents a list of minimum medicine needs for a basic health care system and essential medicines for priority diseases. The Model List covers contraceptive methods, including implants. The type of implants mentioned in the Model List is a two-rod levonorgestrel-releasing implant. (See p. 23 of the full-text document.) The WHO Model Lists of Essential Medicines has been updated every two years since 1977.
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