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Primary urethral groove
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Primary urethral groove : ウィキペディア英語版
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.
In humans, it typically appears around 8 weeks of gestation and becomes closed into a normal male urethra by the 12th week.
==Pathology==
Failure of complete closure can be associated with hypospadias.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Primary urethral groove」の詳細全文を読む



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