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Related to perivitelline space: pronucleus, vitelline membrane, zona pellucida, perivitelline membrane
the space between the vitelline membrane and the zona pellucida, appearing in an ovum immediately following fertilization.
the space between a mammalian ovum and the zona pellucida, into which the polar bodies are released at the time of maturation. In some animals it is a fluid-filled space that separates the fertilization membrane from the vitelline membrane surrounding the ovum after the penetration of a spermatozoon.