Phenotypic differentiation of the male and female urogenital tracts

In typical XX individuals, the müllerian ducts give rise to the fallopian tubes, uterus, and upper vagina and the Wolffian ducts persist in vestigial form. In typical XY individuals, the Wolffian ducts give rise to the epididymides, vasa deferentia, seminal vesicles, and ejaculatory ducts and the müllerian ducts regress.