Hormone
levonorgestrel
le·vo·nor·ges·trel [ lee-voh-nor-jes-trel ]
Brand Names:
Aftera; Afterpill; AfterPlan; BionaFem; Climara Pro; E-Con; EContra; Fallback Solo; Kyleena; Liletta; Mirena; Morning After; My Choice; My Way; New Day; Next Choice One Dose; Opcicon One-Step; Option 2; Plan B One-Step; PostDay One-Step; Preventeza; React; Skyla; Take Action; Twirla
Effect:
Decreased Embryonic Implantation; Hypothalamic Endocrine Activity Alteration; Inhibit Ovulation
May Prevent:
Pregnancy
More Information:
Definitions related to levonorgestrel:
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A form of the hormone progesterone that is made in the laboratory and used to prevent pregnancy. It is being studied in the prevention of ovarian and endometrial cancer, and in the treatment of other conditions. Levonorgestrel is a type of oral contraceptive.NCI Dictionary of Cancer TermsU.S. National Cancer Institute, 2021
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A synthetic progestational hormone with actions similar to those of PROGESTERONE and about twice as potent as its racemic or (+-)-isomer (NORGESTREL). It is used for contraception, control of menstrual disorders, and treatment of endometriosis.NLM Medical Subject HeadingsU.S. National Library of Medicine, 2021
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The levorotatory form of norgestrel and synthetic progestogen with progestational and androgenic activity. Levonorgestrel binds to the progesterone receptor in the nucleus of target cells, thereby stimulating the resulting hormone-receptor complex, initiating transcription, and increasing the synthesis of certain proteins. This results in a suppression of luteinizing hormone (LH) activity and an inhibition of ovulation, as well as an alteration in the cervical mucus and endometrium.NCI ThesaurusU.S. National Cancer Institute, 2021
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Levonorgestrel, synthetic progestogen (any progestational steroid, such as progesterone) that is used as a form of contraception in women. Levonorgestrel is the mirror compound (enantiomer) of norgestrel, which was synthesized in the early 1960s by American scientist Herschel Smith at the...Encyclopedia Britannica, Inc., 2020
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