Sexual Development Summary Sheet

 

Primordial Gonads

(bipotential or bisexual)

Genetic Females (XX)

¬No SRY gene

Genetic Males (XY)

SRY gene makes testis determining factor®

Gonads become ovaries

Gonads become testes

No testicular hormones

Testicular hormones

(anti-Müllerian hormone & androgens)

¯

¯

¯

¯

Müllerian System Develops (feminization)

Wolffian System Withers (demasculinization)

Müllerian System Withers (defeminization)

Wolffian System Develops (masculinization)