Study tests if washing or clothing blocks hormone gel transfer

NCT ID NCT02994602

First seen Feb 11, 2026 · Last updated Apr 30, 2026 · Updated 15 times

Summary

This study looked at whether a hormone gel (Nestorone + testosterone) applied to men's shoulders could transfer to women during skin contact. Researchers tested three scenarios: direct contact, contact after the man wore a shirt, and contact after the man washed the application area. The goal was to see if washing or clothing could prevent the gel from reaching women. 26 healthy men and women took part in this early-stage study.

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Contacts and locations

Locations

  • Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center

    Torrance, California, 90509, United States

  • University of Washington Medical Center & Health Sciences

    Seattle, Washington, 98195, United States

Conditions

Explore the condition pages connected to this study.