polyspermy


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polyspermy

 [pol″e-sper´me]
fertilization of an ovum by more than one spermatozoon; occurring normally in certain species (physiologic polyspermy) but only abnormally in species such as humans (pathologic polyspermy).

pol·y·sper·my

(pol'ē-sper'mē),
The entrance of more than one sperm into the oocyte.
Synonym(s): polyspermia (1) , polyspermism

polyspermy

/poly·sper·my/ (-sper´me) fertilization of an oocyte by more than one spermatozoon; occurring normally in certain species (physiologic p.) and sometimes abnormally in others (pathologic p.) .

polyspermy

(pŏl′ē-spûr′mē)
n.
The entry of several sperm into one ovum during fertilization.

pol′y·sper′mic adj.

pol·y·sper·my

(pol'ē-spĕr'mē)
The entrance of more than one sperm into the oocyte during fertilization.
Synonym(s): polyspermia (1) , polyspermism.

polyspermy

fertilization of an ovum by more than one spermatozoon; occurring normally in certain species (physiological polyspermy) and sometimes abnormally in others (pathological polyspermy).
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References in periodicals archive ?
Oviduct function in pigs, with particular reference to the pathological condition of polyspermy.
Oviduct-specific glycoprotein and heparin modulate sperm-zona pellucida interaction during fertilization and contribute to the control of polyspermy.
Absence of a complete block to polyspermy after fertilization of Mytilus galloprovineialis (Mollusca, Pelecypoda) oocytes.
An ultrastructural analysis of polyspermy in the surf clam, Spisula solidissima.
1]) sperm densities lessen (or eliminate) the effect of polyspermy (Ebert & Houk 1984).
greater than or equal to] 1,200 s for blacklip abalone and [greater than or equal to] 480 s for greenlip abalone) at the highest density where eggs were destroyed, presumably by polyspermy.
As soon as any male first released sperm, the other males were removed to avoid possible polyspermy.
Polyspermy resulting from high sperm density could be the cause of the abnormal development.
The effects of exposing the sperm to GAGs on the rate of polyspermy and on formation of 2 pronuclei (2 PN) at 18 h after insemination was examined (Table 1).
This event is thought to be a weak blocking against polyspermy, because the classic cortical reaction initiated by cortical granule exocytosis could not be observed in this species.