 The AMH molecules bind to AMHRII (Anti-Mullerian Hormone Receptor Type II) regressing the Müllerian duct.The Leydig cells secrete testosterone to aid male differentiation process by inducing structures such as the epididymis, vas deferens and seminal vesicles.However, with PMDS individuals, the Müllerian Duct persists instead of regressing, due to errors with AMH or the AMH receptor.