Dictionary > Fertilization membrane

Fertilization membrane

Definition
noun
The membrane that forms on the inner surface of the vitelline membrane of the ovum after the entry of a spermatozoon, thereby acting as a barrier to prevent additional penetration of other spermatozoa.
Supplement
The formation of this membrane around the fertilized ovum prevents multiple fertilization; a mechanism called slow block to polyspermy.
See also: monospermy.


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