genital ridge


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genital ridge

[′jen·ət·əl ′rij]
(embryology)
A medial ridge or fold on the ventromedial surface of the mesonephros in the embryo, produced by growth of the peritoneum; the primordium of the gonads and their ligaments.
References in periodicals archive ?
Gray and Skandalakis thought that, since in most cases, the each testis has his own deferent duct, the crossing over occurred during testicular descent, each testis arising from the ipsilateral genital ridge.
In fetal life, at about 6 weeks of gestation, the primordial testis develops from the primitive genital ridge medial to the mesonephric ducts.
Studying fish and reptiles, he traced their journey through the yolk sac, embryo, and back, where he found that the cell population grew from 100 at the beginning to about 4000 by the time they reached the genital ridge.
The genital ridge is located superficial to and medial to the developing mesonephros.
The next stage in this genetic potential is realized when the genital ridge in the developing fetus becomes a bi-potential gonad.
Complete separation of the testes and drainage system requires duplication of both the genital ridge and the mesonephric duct.