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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

polar body

n
(Biology) physiol a tiny cell containing little cytoplasm that is produced with the ovum during oogenesis when the oocyte undergoes meiosis
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

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.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Therefore, during IVF, 3PN incidences are generally due to a retention of the second polar body after ICSI, in addition to other factors that have not yet been studied in detail (6, 7).
To evaluate the effect of EGCG on nuclear maturation of mature oocytes, the first polar body extrusion rate was measured.
Furthermore, it provides fundamental information to pursue advanced hatchery techniques such as triploid or tetraploid induction, which are commonly reliant on polar body extrusion times.
Moreover, a small cell known as a polar body grew to an unusually large size during the process, which could indicate developmental abnormalities.
The formation of the first polar body was observed in the early of 3 minutes after fertilization occurred.
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.
Oocytes that had germinal vesicle breakdowns (GVBD) were considered to be at the start of meiosis, while oocytes that extruded the first polar body (PB1) were considered to be at nuclear maturation.
Only MII oocytes with extruded first polar body were micro-injected.
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.
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.