fertilization membrane


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fer·til·i·za·tion mem·brane

a viscous membrane formed on the inner surface of the vitelline membrane from the cytoplasm of the egg cell after entry of the sperm, preventing the entry of additional sperm.

fertilization membrane

a viscous membrane surrounding a fertilized ovum that prevents penetration of additional spermatozoa. It is formed by granules that are released by the fertilized ovum and adhere to the vitelline membrane.

fertilization membrane

a membrane that appears at the surface of the egg after FERTILIZATION. It is effectively a thickened VITELLINE MEMBRANE that may separate from the surface of the egg; it prevents the entry of additional sperms.
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It will develop to hatching in the fertilization membrane that always keeps the same overall size (1.
The wrinkling may be caused by the lack of space in the fertilization membrane (Chia, 1968; Byrne and Barker, 1991; Henry et al.
Completely direct development of Abatus cordatus, a brooding schizasterid (Echinodermata: Echinoidea) from Kerguelen, with description of perigastrulation, a hypothetical new mode of gastrulation
Release of ovoperoxidase from sea urchin eggs hardens the fertilization membrane with tyrosine crosslinks.
The formation of the fertilization membrane of the sea urchin egg.
Oxidase activity associated with the elevation of the penaeoid shrimp hatching envelope
After the loss of the fertilization membrane upon hatching, the unciliated portion of the late gastrula enabled it to attach to the substrate, well before the appearance of the brachiolar arms [ILLUSTRATION FOR FIGURE 9F OMITTED].
hexactis, another brooding asteroid overlaying its eggs, the maternal presence is proposed to be essential to help the hatching embryo tear the fertilization membrane (Chia, 1966).
Prespawning behavior, spawning, and development of the brooding starfish Leptasterias polaris
At 2 h after insemination, almost 100% of the eggs with fertilization membranes started to cleave.
Morphology and gene analysis of hybrids between two congeneric sea stars with different modes of development

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