part_of starts_at ends_at nephric duct female reproductive system nephric duct of female mesonephric duct of female anatomical_structure The nephric duct of female (nd) (syn: mesonephric duct of female, Wolffian duct of female) (TS:20-TS:24). Paired epithelial ducts which develop early in development in the cranial/anterior intermediate mesoderm and extend caudally down the rostro-caudal axis of the embryo to terminate at the urogenital sinus/pelvic urethra. Part of the reproductive system from TS:20. Develops from the nephric duct (TS:19), and is located in mesonephros (anterior) and then at its caudal end (posterior), connects to the dorsal, anterior urogenital sinus (caudal urogenital sinus) at the urogenital sinus ridge. Marked by Cdh1, Pax2 (also seen in the paramesonephric duct) and Hoxb7 (specific to the nephric duct). From TS:20-24, is comprised of epithelium of nephric duct of female and mesenchyme of nephric duct of female (the mesenchyme surrounding the epithelial duct). In females, the nephric duct degenerates in a rostral to caudal wave beginning at TS:22 and complete by TS:25, with only remnants seen at TS:24. EMAPA:35590 Wolffian duct of female TS20 TS24