polar body


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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

n
(Biology) physiol a tiny cell containing little cytoplasm that is produced with the ovum during oogenesis when the oocyte undergoes meiosis

po′lar bod′y


n.
one of the minute cells arising from the unequal meiotic divisions of the ovum at or near the time of fertilization.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.polar body - a small cell containing little cytoplasm that is produced along with the oocyte and later discarded
cell - (biology) the basic structural and functional unit of all organisms; they may exist as independent units of life (as in monads) or may form colonies or tissues as in higher plants and animals
References in periodicals archive ?
This system must be suitable for the implementation of ICSI, and other treatments, such as polar body biopsy, Trophektodermbiopsie, laser-assisted hatching.
They also cover pathology, including omics for oocyte selection, alterations in gene expression, transgenerational risks by exposure in utero, obesity and oocyte quality, the safety of ovarian stimulation, epigenetics, and the genetic basis for primary ovarian insufficiency, and technology and clinical medicine, with discussion of polar body screening for aneuploidy and transplantation of ovarian tissue or immature oocytes to preserve and restore fertility.
At 10 min of incubation, there was an extrusion of the second polar body, with characteristics, size, and location of appearance similar to the first polar body (Fig.
The winner will be chosen based on the results of the revolutionary new fitness assessment tool - Polar Body Age Test - an indicator of overall improved health.
Parthenogenesis occurs when an egg or ovum fuses with a cell called a sister polar body, a byproduct of ova production, rather than with male sperm, to promote cell division.
Extensive studies of meiotic spindle motility in mouse oocytes have revealed a detailed series of movements during meiotic asymmetric divisions: during first meiotic division, the MI spindle forms initially at the center of the oocyte and migrates toward the periphery; the first polar body (PB1) is extruded after microtubule-cortex attachment (Maro et al.
Dr Fishel, a former pupil of King David School, Childwall, said: "We are delighted to announce the world's first pregnancy using real-time polar body array Comparative Genomic Hybridization (CGH) and the baby is due later in the spring.
Dr Fishel said: "We are delighted to announce the world's first pregnancy using real time polar body array Comparative Genomic Hybridization (CGH) and the baby is due later in the spring.
Although people can't naturally reproduce this way, a woman's egg also retains an extra set of chromosomes in a polar body until fertilization.