Levonorgestrel meaning

lē'və-nôr-jĕs'trəl
The levorotatory form of norgestrel, used in oral contraceptives and in contraceptives implanted subdermally. In implant form it can prevent pregnancy for up to five years.
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The levorotatory form of the progestin norgestrel, used for emergency contraception, and, in combination with estrogen, in oral contraceptives and in hormone replacement therapy.
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A synthetic progestogen used as an active ingredient in some hormonal contraceptives.
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