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==EMBRYOLOGICAL DEVELOPMENT OF THE GENITAL TRACT==

==EMBRYOLOGICAL DEVELOPMENT OF THE GENITAL TRACT==

*Primitive structures which will become gonads and genital tract are identical at this stage.  

*Primitive structures which will become gonads and genital tract are identical at this stage.  

*Paired mesonephric ducts (Wolffian) or paramesonephric (Mullerian) ducts fuse caudally with urogenital sinus.

*Paired mesonephric ducts (Wolffian) or paramesonephric (Mullerian) ducts fuse caudally with urogenital sinus.

<Br>(Metanephros - becomes the kidney).

(Metanephros - becomes the kidney).

===Gonadal differentiation===

===Gonadal differentiation===

*Absence of testes in presence of ovaries allows paramesonephric ducts to develop under influence of oestrogen to oviduct, uterus, cervix and cranial vagina.

*Absence of testes in presence of ovaries allows paramesonephric ducts to develop under influence of oestrogen to oviduct, uterus, cervix and cranial vagina.

'''Summary of determinants of sexual development'''

===Summary of determinants of sexual development===

Chromosomal or genetic sex = sex chromosomes

Chromosomal or genetic sex = sex chromosomes

<br>Gonadal sex = ovary or testis

<br>Gonadal sex = ovary or testis

<br>Phenotypic sex = usually determined by gonad

<br>Phenotypic sex = usually determined by gonad