chorion

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Related to chorions: chorion frondosum, chorion laeve
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  • noun

Words related to chorion

the outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals)

References in periodicals archive ?
78 CHANGES IN THE CHORION DUE TO FERTILIZATION AND EXTENDED INCUBATION IN THE CALIFORNIA GRUNION, LEURESTHES TENUIS
A chronometer was used to measure the time each nymph spent on the top of each egg/chorion visited, and the time needed from emergence to final position adjacent to the chorions, facing them (Fig.
The movement of nymphs on the top of the eggs/ chorions and stopping on several for a period of time reinforces the hypothesis of symbiont acquisition.
Interestingly, the chorions of unfertilized eggs cultured in the presence of 0.
In this study, embryos cultured in plastic petri dishes filled with seawater alone died after 3 days, while those cultured in seawater supplemented with fresh or freeze-dried oviductal gland jelly underwent sufficient chorion expansion to support normal development and hatching.
Dichorionic twins always have a membrane comprised of two chorions and two amnions that is four layers thick; on ultrasound it measures at least 2 mm thick.
TORONTO -- Destruction of the chorion in women who are diagnosed with preterm premature rupture of membranes and chorioamnionitis may be due to cell death triggered by inflammation.