News tagged with oocyte
From embryonic stem cells, a sperm replacement and easier path to genetic modification
Researchers reporting in the April 27 issue of the journal Cell have devised a new and improved method for producing genetically modified animals for use in scientific research. The method relies on haploi ...
Apr 26, 2012 |
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By temporarily silencing a hyperactive gene, scientists dramatically boost the efficiency of mouse cloning
In principle, somatic cell nuclear transfer (SCNT) is a potent tool for scientists looking to produce exact genetic replicas of a particular animal. By injecting a nucleus from an adult cell into an oocyte ...
Mar 16, 2012 |
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Oocytes: Going with the flow
Most cells rely on structural tethers to position chromosomes in preparation for cell division. Not so oocytes. Instead, a powerful intracellular stream pushes chromosomes far-off the center in preparation ...
Aug 28, 2011 |
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Fishing games gone wrong
When an egg cell is being formed, the cellular machinery which separates chromosomes is extremely imprecise at fishing them out of the cell's interior, scientists at the European Molecular Biology Laboratory ...
Aug 18, 2011 |
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Higher chance of twins after IVF for taller women: study
Taller women who become pregnant after receiving two embryos through in-vitro fertilisation have more chance of giving birth to twins, a Dutch study presented Monday found.
Jul 04, 2011 |
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Why chemotherapy causes more infertility in women than in men
For a long time a relationship between infertility and chemotherapeutic agents has been assumed. Now, the mechanism has been elucidated. Mainly women are affected because the quality control in the oocytes is different from ...
Feb 22, 2011 |
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Advancements in fertility preservation provide oncology patients new options
Many young people who've just learned that they have cancer also are told that the therapies that may save their lives could rob them of their ability ever to have children. Infertility caused by chemotherapy and radiation ...
Jan 03, 2011 |
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Researchers build 'artificial ovary' to develop oocytes into mature human eggs
(PhysOrg.com) -- Researchers at Brown University and Women & Infants Hospital have invented the first artificial human ovary, an advance that provides a potentially powerful new means for conducting fertility ...
Medicine & Health / Medical research
Sep 14, 2010 |
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Why the biological clock? Study says aging reduces centromere cohesion, disrupts reproduction
University of Pennsylvania biologists studying human reproduction have identified what is likely the major contributing factor to the maternal age-associated increase in aneuploidy, the term for an abnormal ...
Sep 08, 2010 |
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Biologists determine microRNA activity is suppressed in mouse ovum
Biologists at the University of Pennsylvania studying oocytes in mice, the immature egg cells necessary for sexual reproduction, have demonstrated an unusual behavior in microRNA, or miRNA, activity that may be the first ...
Feb 03, 2010 |
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Researchers identify key proteins needed for ovulation
Researchers from the National Institutes of Health and other institutions have identified in mice two proteins essential for ovulation to take place.
Medicine & Health / Medical research
May 14, 2009 |
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Oocyte
An oocyte, ovocyte, or rarely ocyte, is a female gametocyte or germ cell involved in reproduction. In other words, it is an immature ovum, or egg cell. An oocyte is produced in the ovary during female gametogenesis. The female germ cells produce a primordial germ cell (PGC) which undergoes a mitotic division to form an oogonium. During oogenesis the oogonium becomes a primary oocyte (pronounced oh'a-site).
For more information about Oocyte, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
