| Primary urethral groove | |
|---|---|
| Latin | sulcus urethralis primarius |
| Precursor | urogenital folds |
| Gives rise to | urethra |
| Code | TE E5.6.4.2.1.7.3 |
The primary urethral groove or urethral groove is a temporary linear indentation on the underside (ventral side) of the male penis during embryonic development.
In humans, it typically appears around 8 weeks of gestation and becomes closed into a normal male urethra by the 12th week.
Failure of complete closure can be associated with hypospadias.[1]
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