Primary urethral groove

The primary urethral groove or urethral groove is a temporary linear indentation on the underside (ventral side) of the male penis during embryonic development.

Primary urethral groove
Precursorurogenital folds
Gives rise tourethra
Latinsulcus urethralis primarius
Anatomical terminology

In humans, it typically appears around 8 weeks of gestation and becomes closed into a normal male urethra by the 12th week.

Clinical significance

Failure of complete closure can be associated with hypospadias.[1]


  1. Holland AJ, Smith GH (August 2000). "Effect of the depth and width of the urethral plate on tubularized incised plate urethroplasty". J. Urol. 164 (2): 489–91. doi:10.1016/S0022-5347(05)67408-3. PMID 10893631.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.