abnormal Wolffian duct morphology Wolffian duct degeneration nephric duct degeneration a retrogressive impairment of function or destruction of the transient embryonic drainage tubes of the embryonic kidney (mesonephric tubules) that empty into the cloaca and later develop into the ductus deferens in the male Leydig's duct degeneration MP:0009074 MPheno.ontology archinephric duct degeneration Gartner's duct degeneration pronephric duct degeneration mesonephric duct degeneration ductus mesonephricus degeneration mesonephric duct degeneration