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Background
Novel male‐based contraceptives are needed to broaden family planning choices. A progestin, Nestorone® (Nes) gel, plus a testosterone (T) gel suppresses sperm concentrations to levels associated with effective contraception in normal men. However, administration of two gels on different parts of the body daily is impractical.
Objective
Compare the effectiveness of daily application of...
Development of a male hormonal contraceptive has been challenging ascribable to the failure to adequately suppress spermatogenesis in 5–10% of men. Methods to identify incomplete suppressors early in treatment might identify men most responsive to male hormonal contraceptives. We hypothesized that serum hormone and gonadotropin concentrations after 4 weeks of transdermal treatment with testosterone...
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