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Related Experiment Videos

Ovarian function during low-dose oral contraceptive use

C Egarter1, M Putz, H Strohmer

  • 1Department of Obstetrics and Gynecology, University of Vienna, Austria.

Contraception
|June 1, 1995
PubMed
Summary

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Low-dose oral contraceptives (OCs) containing 20 micrograms ethinylestradiol (EE) did not increase ovarian follicle or cyst formation compared to higher EE doses. This study investigated follicle development during two low-dose OC regimens.

Area of Science:

  • Reproductive Endocrinology
  • Pharmacology

Background:

  • Modern oral contraceptives (OCs) often feature lower steroid doses.
  • Concerns exist regarding potential increases in ovarian follicle and cyst formation with reduced steroid dosages.

Purpose of the Study:

  • To compare ovarian follicle and cyst incidence during use of two low-dose oral contraceptives (OCs).
  • To evaluate the impact of different ethinylestradiol (EE) and progestogen combinations on ovarian activity.

Main Methods:

  • A randomized study involving 65 volunteers over 2 months.
  • Participants received either 20 mcg EE + 150 mcg desogestrel or 35 mcg EE + 250 mcg norgestimate.
  • Vaginal ultrasonography and serum hormone levels were monitored.

Main Results:

Keywords:
AustriaBiologyComparative StudiesContraceptionContraceptive AgentsContraceptive Agents, FemaleContraceptive Agents, ProgestinContraceptive MethodsDesogestrelDeveloped CountriesDiseasesEuropeFamily PlanningGenitaliaGenitalia, FemaleNorgestimateOral ContraceptivesOral Contraceptives, Low-doseOvarian CystsOvarian EffectsOvaryPhysiologyResearch MethodologyResearch ReportStudiesUrogenital SystemWestern Europe

Related Experiment Videos

  • Follicle frequency (< 35 mm) decreased significantly in both groups by the end of treatment (from 39% and 31% to 14%).
  • Only one participant in the higher EE group developed a cyst (> 35 mm).
  • Ovulation markers were observed in one participant per group; no pregnancies occurred.

Conclusions:

  • A 20 mcg EE oral contraceptive did not result in a higher incidence of ovarian follicles or cysts compared to a 35 mcg EE formulation.
  • The progestogen type and dose may play a role in mitigating ovarian activity with low-dose OCs.