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Topic: Ootid


In the News (Tue 22 Dec 09)

  
  Ootid - Wikipedia, the free encyclopedia
An ootid is a female gametid, as opposed to a male spermatid.
Two ootids are formed by meiosis of a secondary oocyte.
This page was last modified 08:21, 27 April 2006.
en.wikipedia.org /wiki/Ootid   (54 words)

  
 ArmObGyn.com-Research Centre of Maternal and Children health Protaction- Official website   (Site not responding. Last check: 2007-10-23)
The in vitro fertilization since 80 years is the most effective way of treatment infertility, especially in cases, when the woman has obstruction of uterine tubes or at the man in a sperm the low contents of spermatozoon or down stroke of their mobility is observed.
The essence of procedure of in vitro fertilization (IVF) consists of reception from the ovaries of woman of mature ootids, fertilization by husband spermatozoon (or at the request of both spouses by semen of the donor), cultivation turned out embryos in an incubator within 48-72 hours, and transfer embryo in a uterus of patient.
The disability of an ootid to a fertilization and division can be connected to difficulties of the procedure (damage of an ootid), and also with the quality of sex cells.
www.armobgyn.com /text.php   (3081 words)

  
 Oocyte - Wikipedia, the free encyclopedia
The egg may be expelled from the ovary in this condition, and in many species, including humans, the second meiotic division is not completed until the egg is fertilized by a sperm.
The oocyte divides in meiosis II into one ootid and the second polar body.
The secondary oocyte is the largest cell in the body, and in humans is just visible to the naked eye.
en.wikipedia.org /wiki/Oocyte   (336 words)

  
 Glossary - AnSc 300/301   (Site not responding. Last check: 2007-10-23)
Cell type in the ovary undergoing meiosis leading to polar body formation and eventually to an ootid (mature egg) theoretically.
Mitotic and meiotic divisions and associated events by which the primordial germ cells in the female are transformed into ova.
Haploid female gamete after shedding polar bodies; often the oocyte dies without ootid formation unless fertilization occurs.
www.ansci.cornell.edu /courses/as300/gloss13.htm   (254 words)

  
 Dorlands Medical Dictionary
The secondary oocyte (one in the period between the first and second maturation division) is derived from a primary oocyte shortly before ovulation by a division that splits off the first polar body.
If fertilized, the secondary oocyte divides into an ootid and the second polar body; otherwise it perishes.
In mammals, the second maturation division is not completed unless fertilization occurs; hence the ootid has male as well as female pronuclear (haploid) elements.
www.mercksource.com /pp/us/cns/cns_hl_dorlands.jspzQzpgzEzzSzppdocszSzuszSzcommonzSzdorlandszSzdorlandzSzdmd_o_03zPzhtm   (3341 words)

  
 lifeissues.net | "The Carnegie Stages of Early Human Embryonic Development: Chart of all 23 Stages, Detailed ...
(b) Ootid The cell characterized by the presence of the male and female pronuclei is termed an ootid (figs, l and 1-2).
The cytoplasm of the ootid has a diameter of about 100 μm (Hamilton, 1946; Noyes et al., 1965); each of the pronuclei measures about 30 μm (Zamboni et al., 1966).
Although "in most mammalian species, the male pronucleus has been reported to be larger than the female pronucleus," the converse has been found in one human specimen and, in two others, the pronuclei appeared to be of equal size (Zamboni, 1971).
www.lifeissues.net /writers/irv/irv_123carnegiestages2.html   (4364 words)

  
 SD-Meiosis   (Site not responding. Last check: 2007-10-23)
In humans only one of these, the secondary oocyte continues into the second meiotic division, the other product (called a polar body) has no further role.
The secondary oocyte proceeds through the second meiotic division producing an Ootid and a second polar body, which is discarded.
It is the ootid that differentiates into the mature female gamete; the Ovum.
www.brooklyn.cuny.edu /bc/ahp/SDKC/Meiosis/SD_MEKC_germCell.html   (252 words)

  
 Gametogenesis Summary - Gametogenesis Information
Another meiotic division results in the production of an ootid and yet another polar body (the eventual number of polar vies associated with an ovum may equal as many as three if the first sloughed off polar body undergoes a subsequent division.
Cellular differentiation of the ootid yields an ovum ready for fertilization.
In many cases, however, the last maturational processes are accelerated because in human females, meiosis II is usually completed after fertilization.
www.bookrags.com /sciences/genetics/gametogenesis-wog.html   (738 words)

  
 Metabolic Cooperation Following Fusion of Starfish Ootid and Primary Oocyte Restores Meiotic-Phase-Promoting Activity ...
Metabolic Cooperation Following Fusion of Starfish Ootid and Primary Oocyte Restores Meiotic-Phase-Promoting Activity -- Guerrier and Neant 83 (13): 4814 -- Proceedings of the National Academy of Sciences
In the starfish Marthasterias glacialis, polyethylene glycol (PEG) homologous fused pairs consisting of two immature oocytes, blocked at the germinal vesicle stage, or two ootids, blocked at the female pronucleus stage, remain arrested at these specific stages, unless they are stimulated by the hormone 1-methyladenine.
In contrast, heterologous pairs develop up to female pronucleus formation in the immature partner, indicating that maturation-promoting factor was formed under these conditions.
www.pnas.org /cgi/content/abstract/83/13/4814   (222 words)

  
 Online Viagra medicine shows that in the best way this question will be answered with such digits.   (Site not responding. Last check: 2007-10-23)
From the stayed amount only insignificant part reaches an ostium of uterine tubes, and as the ootid is only in one uterine tube, half of spermatozoon again remains not at has put.
Online Viagra medicine shows that besides, not all spermatozoa manage to get in a uterine tube, as a result of all it and ootid of all about 200 spermatozoon reach.
Online Viagra medicine shows that the probability of a conception at presence in a semen only one spermatozoon is, but such what to win the automobile, having bought one lottery, much easier.
www.erectile-strong.com /online-viagra.html   (239 words)

  
 ODU Biology 108N: Miniunit Gamma
Draw this diagram in your notes and identify the oogonium, primary oocyte, secondary oocyte, polar bodies, ootid, egg or ovum.
Note the differences between oogenesis and spermatogenesis in that only one egg cell is produced during this process and not four.
The other three cells form polar bodies which are absorbed and digested by the functional ootid.
www.lions.odu.edu /~knesius/miniunits/gamma/gam45.htm   (1088 words)

  
 ootid - OneLook Dictionary Search
Tip: Click on the first link on a line below to go directly to a page where "ootid" is defined.
ootid : Encarta® World English Dictionary, North American Edition [home, info]
ootid : Dorland's Illustrated Medical Dictionary [home, info]
www.onelook.com /?w=ootid   (140 words)

  
 Gametogenesis   (Site not responding. Last check: 2007-10-23)
When a primary oocyte undergoes meiosis, a large haploid secondary oocyte and a very small first polar body result.
A second meiotic division produces a large ootid and a very small second polar body.
The unequal cytokinesis that occurs has the advantage of providing the ovum with a much greater amount of cytoplasm and stored food than if an equal division were to occur.
www.scientia.org /cadonline/biology/reproductive/gametogena2.ASP   (210 words)

  
 Otid - OTID.com is the ultimate guide for travel professionals on the web today. It provides agents a cross-category ...
Search for "ootid" in all of MSN Encarta ootid.
Meiosis leading to polar body formation and eventually to an ootid (mature egg) theoretically are transformed into ova.
A) Phase contrast view of human ootid after fixation and staining Electron micrograph of the male and female pronuclei in a human ootid.
www.destarter.com /ootid/otid.html   (307 words)

  
 Gametogenesis   (Site not responding. Last check: 2007-10-23)
When a primary oocyte undergoes meiosis, a large halpoid secondary oocyte and a very small first polar body result.
The first polar body may or may not divide during the second meiotic division into two additional second polar bodies.
After meiosis, the ootid quickly differentiates into the mature egg cell or ovum.
www.scientia.org /cadonline/Biology/reproductive/gametogen.ASP   (296 words)

  
 Viewing a thread   (Site not responding. Last check: 2007-10-23)
An oocyte or ovocyte is a female gametocyte that divides twice by mitosis and meiosis into two other oocytes or into two ootids.
A primary oocyte is just a kind of initial oocyte that is formed by mitosis of an oogonium into two primary oocytes.
Each primary oocyte forms by meiosis two secondary oocytes, and each secondary oocyte divides into one ootid.
www.ttha.com /mbbs/forums/thread-view.asp?tid=499&mid=4068   (715 words)

  
 untitled
After the first meiotic division there is a secondary haploid cell that receives all of the cytoplasm and the first polar body that receives almost none of the cytoplasm.
The second meiotic division also has an unequal division of cytoplasm resulting in a large, haploid, daughter cell known as the ootid and a second polar body.
The polar bodies eventually degrade and the ovum results.
www.msu.edu /~mille985/division.html   (1626 words)

  
 [No title]
Oogonium: Diploid primordial cells at the start of oogenesis.
Ootid: Product of second meiotic division Ovum: Product of mature ootid.
Polar body: A cell that is produced in first and/or second meiotic division in females as a result of unequal cytokinesis.
www.ben.edu /faculty/amartin/IA_STGUIDE_PRACTSET_CH2.doc   (1319 words)

  
 Erectile Dysfunction   (Site not responding. Last check: 2007-10-23)
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www.etg-online.com /erectile-dysfunction-11   (1567 words)

  
 ootid - English-French Dictionary - WordReference.com
We found no French translation for 'ootid' in our English to French Dictionary.
Look for a definition in our English Dictionary.
Forum discussions with the word(s) 'ootid' in the title:
www.wordreference.com /enfr/ootid   (57 words)

  
 oostegite Oostegite - definition of Oostegite by the Free Online Dictionary ...
Palm a distal surface or margin of segment 6 propod of a peraeopod, especially a gnathopod, against which segment 7 dactyl closes defined posteriorly bya sharp
Websters Online Dictionary - The Rosetta Edition Websters Online Dictionary The Rosetta Edition OOSTEGITE OOTHECA OOTHECAE OOTID OOTOCOID OOTOOID OOTYPE OOZE OOZE LEATHER OOZE OUT OOZE THROUGH
ZOOTAXA Oostegites 24 ovaltriangular shaped, tapering distally oostegites 2 and 3 simple, laminar-like oostegite 4.
kristy.homepage18.freehomeauto.com /1147570897.html   (786 words)

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