The Injectable Contraceptives Depot Medroxyprogesterone Acetate and Norethisterone Enanthate Substantially and Differentially Decrease Testosterone and Sex Hormone Binding Globulin Levels: A Secondary Study from the WHICH Randomized Clinical Trial

    August 2024 in “ PLoS ONE
    Chanel Avenant, Mandisa Singata‐Madliki, Alexis J. Bick … Janet P. Hapgood
    Studysummary In this study, researchers reported that both progestin-only injectable contraceptives, DMPA-IM and NET-EN, significantly decreased serum testosterone and SHBG levels among HIV-negative women in South Africa, yet this did not explain prior findings of no reduction in risky sexual behavior or sexual function.
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    Research cited in this study 2

    1. Levonorgestrel Effects on Serum Androgens, Sex Hormone-Binding Globulin Levels, Hair Shaft Diameter, and Sexual Function Fertility and Sterility · 2009
    2. Androgenic Effects of Oral Contraceptives: Implications for Patient Compliance The American Journal of Medicine · 1995