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Selectivity information on desogestrel

D Collins1

  • 1College of Medicine, University of Kentucky, Lexington.

American Journal of Obstetrics and Gynecology
|March 1, 1993
PubMed
Summary
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Newer oral contraceptives use selective progestins, like desogestrel, for improved efficacy and fewer side effects. Desogestrel and its metabolite, 3-keto-desogestrel, show high selectivity, reducing androgenic effects.

Area of Science:

  • Pharmacology
  • Endocrinology
  • Reproductive Health

Background:

  • Oral contraceptive formulations have evolved through dose reduction and enhanced progestin selectivity.
  • Progestin selectivity, indicated by the progesterone to androgen receptor affinity ratio, is crucial for therapeutic effects.

Purpose of the Study:

  • To evaluate the selectivity of contraceptive progestins, focusing on desogestrel and its active metabolite.
  • To correlate progestin selectivity with clinical outcomes in oral contraceptive users.

Main Methods:

  • In vitro receptor-binding studies to determine affinity ratios.
  • Animal pharmacologic experiments to assess in vivo effects.
  • Comparison of desogestrel with levonorgestrel regarding androgenicity and progestational activity.
Keywords:
BiologyContraceptionContraceptive AgentsContraceptive Agents, FemaleContraceptive Agents, ProgestinDesogestrelFamily PlanningHormone ReceptorsLipid Metabolic EffectsLipidsMembrane ProteinsPhysiology

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Main Results:

  • Desogestrel exhibits significantly lower androgenicity and slightly higher progestational activity compared to levonorgestrel.
  • 3-keto-desogestrel, the active metabolite, demonstrates the highest selectivity index in binding and animal studies.
  • Desogestrel-containing contraceptives show beneficial effects on lipoprotein metabolism and androgen-dependent skin conditions.

Conclusions:

  • Increased progestin selectivity of desogestrel contributes to favorable clinical outcomes, including improved lipoprotein profiles and management of skin disorders.
  • The high selectivity index of 3-keto-desogestrel supports its role in advanced oral contraceptive formulations.
  • Selective progestins represent a key advancement in oral contraceptive development, offering improved therapeutic profiles.