Urethral groove

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Urethral groove
Precursor urogenital folds
Gives rise to urethra
Dorlands/Elsevier g_12/12402854

The 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.

[edit] Pathology

Failure of complete closure results in a hypospadias.