STDs Urology Urology is the branch of medicine concerned with the urinary tract of both sexes and genital tract of the human male. This site contains information on the anatomy, physiology and disorders or dysfunctions of the male urogenital system. Development Men and women are different from the get-go.
Males result from the XY configuration.
The differentiation of the primitive gonads are genetically determined. In a genetically male embryo, the primitive gonads begins to develop into testicles during the 7th and 8th week of gestation when placental gonadotropic hormones cause the differentiation of the center portion of the gonad while the outer portion regresses. This substance promotes the regression of the primordial female duct system. At 7 weeks the external and internal genitalia are bipotential, but by the 8th week the committment to the male form is made under the influence of testosterone. Male sexual behavior is due to the action of male hormones on the brain in early development.