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A randomized controlled trial of second- versus third-generation oral contraceptives in the treatment of acne

Mitchell P Rosen1, Daniel M Breitkopf, Manubai Nagamani

  • 1Department of Obstetrics and Gynecology, University of Texas Medical Branch, 301 University Boulevard, Rte 0587, Galveston, TX 77555-0587, USA.

American Journal of Obstetrics and Gynecology
|May 16, 2003
PubMed
Abstract

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Birth Control Methods

Vasectomy is a surgical form of male sterilization that involves severing and sealing the vasa deferentia, preventing sperm from mixing with semen during ejaculation. Because a vasectomy does not impact the testes' ability to produce testosterone, hormone levels, libido, and sexual function generally remain unchanged. While vasectomy is highly effective in preventing pregnancy, with a success rate near 99.85%, rare cases of recanalization (spontaneous reconnection) can occur. Although vasectomy...
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Bioequivalence Experimental Study Designs: Completely Randomized and Randomized Block Designs

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