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 ?
Polar body formation and development of female pronucleus.
The first polar body can be used for the production of normal offspring in mice.
Cdc42 activation couples spindle positioning to first polar body formation in oocyte maturation.
In the present study, there was a significant difference in egg activation and polar body formation between the treatments (ANOVA; F : 24.
It has been reported that the method of cumulus cell removal could be affecting the relationship between the first polar body and the MII spindle in both hamster (Silva et al.
The chromosome composition of triploid individuals induced by inhibiting the release of the second polar body released is based on the addition of a set of haploid chromosome to the diploid genome, so that the chromosome types of triploids should theoretically be identical to that of diploids.
Other CGH tests on biopsies from five-day-old embryos require several days to deliver complete results - and thus require the freeze-storage of the embryo before it can be transferred; polar body CGH can be done in real time and does not require freezing
The analysis of polar body 1 already detected 72 % of all aneuploid eggs, but adding the analysis of the second polar body significantly improved the detection rate up to 89 %.
Because both cardiovascular exercise and strength training are essential to a balanced workout, the Polar F55 gives the modern fitness enthusiast a complete exercise session by adding new features like Polar Body Workout, a muscular strength-training guide.