PATHOLOGY

Detailed explanation-1: -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.

Detailed explanation-2: -The testicles produce testosterone. Testosterone triggers the development of the male internal and external reproductive organs during fetal development.

Detailed explanation-3: -Secondary sexual characteristics mediated by testosterone include deepening of the voice and growth of facial, armpit, chest and pubic hair.