Mesonephric duct
（重定向自Archinephric duct）
![](/Images/godic/202412/21/Gray11095358.png")
![Wolffian duct (red) degenerates in females (middle image) and develops in males (bottom).](/Images/godic/202412/21/Gray11105359.png")
![](/Images/godic/202412/21/Gray9865359.png")
![](/Images/godic/202412/21/Gray9925359.png")
The mesonephric duct (also known as Wolffian duct, archinephric duct, Leydig's duct and nephric duct) is a paired organ found in mammals including humans during embryogenesis. Wolffian structures are male urogenital structures that include the epididymis, vas deferens, and seminal vesicles that differentiate from this structure.