Physiology, Testosterone - StatPearls - NCBI Bookshelf
https://www.ncbi.nlm.nih.gov/books/NBK526128/
WebJan 2, 2023 · Testosterone is the primary male hormone responsible for regulating sex differentiation, producing male sex characteristics, spermatogenesis, and fertility. Testosterone’s effects are first seen in the fetus. During the first 6 weeks of development, the reproductive tissues of males and females are identical. At around week 7 in utero, the SRY …
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