Content 
Introduction:
Genetic cause: Hormonal cause

The relationship of the genital and urinary systems in embryological development:

Genitalia development

    Internal genitalia development

    Differentiation of the gonads

                        Male 
                                 Differentiation of Testes  and Descent of the testes

                        Female 
                                  Differentiation of Ovaries  and Displacement of the ovaries

    Development of the internal genital organs
                Indifferent stage  
                                         In males: 
                                                    Differentiation of the canal system in the genital organ
                                                    Differentiation of the accessory sex glands 
                                                    Differentiation of the urogenital sinus
                                           In females: 
                                                    Differentiation of the canal system in the genital organ
                                                    Differentiation of the accessory sex glands 
                                                    Differentiation of the urogenital sinus

    The external genitalia  
           Indifferent stage 
           Differentiated stage of the male genitalia 
           Differentiated stage of the female genitalia