perivitelline space


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Related to perivitelline space: pronucleus, vitelline membrane, zona pellucida, perivitelline membrane

per·i·vi·tel·line space

the space between the vitelline membrane and the zona pellucida, appearing in an ovum immediately following fertilization.

perivitelline space

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.
References in periodicals archive ?
Some of the oocytes were striped off expanded cumulus cells for visualization of the extruded first polar body in the perivitelline space.
Some of these embryos remained normal at the mid-blastula 2 stage (category 0), whereas others exhibited anomalies: inhibition of hatching, precocious appearance of mesenchyme cells in the blastocele, and extrusion of some cells to the perivitelline space (Figure 7C, 8A).
The research team, led by Andrea Laws-King and Alan Trounson of Monash University in Melbourne, squirts one sperm into the perivitelline space, a fluid-filled area between the zona and the membrane enclosing the egg itself.