During early development the gonads of the fetus remain undifferentiated; that is,
ALL FETAL GENITALIA ARE THE SAME AND ARE PHENOTYPICALLY FEMALE; ALL FETAL
GENITALIA ARE THE SAME AND
ARE PHENOTYPICALLY FEMALE; After approximately 6 to 7 weeks of gestation, however, the expression of a gene on the Y chromosome; induces changes that result in the development of the testes; In other words ... We ALL start our lives as girls ... even the boys
