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perineum
(redirected from Anogenital distance)

   Also found in: Dictionary/thesaurus, Medical, Encyclopedia, Wikipedia 0.01 sec.

perineum

Part of the external floor of the pelvis which lies between the anus and the vulva in the female, and between the anus and scrotum in the male. It is a tough sheet of ligaments and muscles.



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Anogenital distance (AGD), a sexually dimorphic trait in rodents and humans, is considered a reliable marker of androgen and antiandrogen effects in rodents, but data on AGD in humans are sparse and longitudinal changes during infancy have not been assessed.
Moreover, boys with a short anogenital distance tended to have smaller penises and were far more likely to have testes that didn't descend properly into the scrotum.
Reproductive biology expert Professor Frederick von Saal, University of Missouri-Columbia in the US, said the male hormone testosterone had a direct effect on anogenital distance, causing it to be longer in males than in females.
 
 
 
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