Regarding sexual differentiation of the fetus?

Goandal development begins at 5th week of intrauterine life and Male sexual differentiation occurs earlier than female."The differentiation of the gonadal ridge into the testis by 43-50 days (7-8 wks) of gestation is a rapid phenomenon that contrasts with the slower and delayed development of the ovary, which will not become apparent until 140 days (20 weeks) of gestation with the .formation of granular cells. Leydig cells are apparent by about 60 days and differentiation of the male external genitals occurs by 65-77 days of gestation.