polar body

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po·lar bod·y

one of two small cells formed by the first and second meiotic division of oocytes; the first is usually released just before ovulation, the second not until discharge of the oocyte from the ovary; in mammals, the second polar body may fail to form unless the oocyte has been penetrated by a sperm.

polar body

n.
Either of two small cells produced during the first and second meiotic divisions in the development of an oocyte, containing little cytoplasm and eventually degenerating.

polar body

one of the small cells produced during the two meiotic divisions in the maturation of a female gamete, or ovum. Polar bodies are nonfunctional and incapable of being fertilized. See also oogenesis.

po·lar bod·y

(pō'lăr bod'ē)
One of two small cells formed by the first and second meiotic division of oocytes; the first is usually released just before ovulation, the second not until discharge of the oocyte from the ovary.
References in periodicals archive ?
An increase in temperature accelerates the release of the polar bodies in diploid and triploid oysters (Eudeline et al.
This is the first study to monitor meiotic events in Anomalocardia brasiliana for the identification of the time of release of the two polar bodies and of the first mitosis and the description of the most frequent number of chromosomes, which was compatible with numbers described for the family Veneridae.
The results showed that in 140 combinations of polar bodies and eggs that were analysed 125 (89 %) polar body analyses confirmed the chromosomal status of the eggs and 15 (11 %) did not.
In both centres all eggs from patients that were obtained after ovarian hyperstimulation, egg retrieval and fertilisation were biopsied for polar bodies 1 and 2.
In No Treatment and DMSO controls, polar bodies formed normally, with PB1 outside the hatching envelope and PB2 inside of it (Fig.
vannamei, the polar bodies form at 8 and 15 min PS.
Stained eggs (n = 100) were scored to determine sperm entry, number of bound sperm, meiotic stage of female DNA, and presence of polar bodies.
Over this same period of time, the polar bodies that are present swell to more than 4 times their normal diameter of 10 [micro]m and then slowly return to normal size.