सबसे बाहरी झिल्लीदार थैली उच्च कशेरुकाओं (सरीसृप पक्षियों और स्तनधारियों) में भ्रूण को संलग्न करती है

Noun:

गर्भ की बाहरी झिल्ली, गर्भवष्टन, गर्भवष्ट, जरायु,

chorion's Usage Examples:

If the multiples are identical, only one chorion membrane is present.

The placenta has one chorion and two amnions, so each twin has its own amniotic sac.

About 30 percent of identical twins have this classification, and each twin has its own chorion, amnion, and placenta.

We do occasionally find mosaicism in chorion villous cells obtained by the CVS test at 12 weeks gestation.

Most insect eggs are of an elongate oval shape; some are globular, others flattened, while others again are flask-shaped, and the outer envelope (chorion) is often beautifully sculptured (figs.

Mums-to-be are currently offered the traditional method in which a needle is inserted inside the womb (amniocentesis or chorion villus sampling ).

chorion villus sampling ).

One important question is whether or not the twins shared a chorion in the womb.

The surface of the chorion is covered evenly with minute villi, constituting a diffuse non-deciduate placenta.

Many Gastropoda deposit their eggs, after fertilization, enclosed in capsules; others, as Paludina, are viviparous; others, again, as the Zygobranchia, agree with the Lamellibranch Conchifera (the bivalves) in having simple exits for the ova without glandular walls, and therefore discharge their eggs unenclosed in capsules freely into the sea-water; such unencapsuled eggs are merely enclosed each in its own delicate chorion.

chorion's Meaning':

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