News tagged with oocyte
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).
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A molecular explanation for age-related fertility decline in women
(Medical Xpress)—Scientists supported by the National Institutes of Health have a new theory as to why a woman's fertility declines after her mid-30s. They also suggest an approach that might help slow ...
Medical research
20 hours ago |
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Better 'mousetrap' discovered in fruit flies might stop human cancer-driving kinase in its tracks
A seemingly obscure gene in the female fruit fly that is only active in cells that will become eggs has led researchers at the Stowers Institute for Medical Research to the discovery of a atypical protein ...
Cancer
Mar 13, 2013 |
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Do ovaries continue to produce eggs during adulthood?
A compelling new genetic study tracing the origins of immature egg cells, or 'oocytes', from the embryonic period throughout adulthood adds new information to a growing controversy. The notion of a "biological clock" in women ...
Genetics
Jul 26, 2012 |
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ART live-birth rates can approach natural fecundity
(HealthDay) -- During assisted reproductive technology, increasing maternal age and number of cycles is linked to lower live-birth rates with the use of autologous oocytes, but not donor oocytes, according ...
Obstetrics & gynaecology
Jun 28, 2012 |
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Time-lapse imaging of embryos reveals complications that undermine cloning efficiency
In 1996, the technique known as somatic cell nuclear transfer (SCNT) transformed the idea of cloning from science fiction into reality. SCNT entails removing the nucleus from an adult somatic cell of the animal ...
Medical research
Jun 01, 2012 |
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The influence of the mother: Maternal epigenetic inheritance
(Medical Xpress) -- A study published in Genes and Development from scientists at the Friedrich Miescher Institute for Biomedical Research pinpoints the importance of maternal epigenetic influences during ...
Genetics
May 07, 2012 |
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New test can better predict successful IVF embryos, scientists say
Scientists at University College Dublin have discovered a new way of measuring the potential success rate of an embryo before it is transferred back into the womb during in vitro fertilisation (IVF).
Obstetrics & gynaecology
Feb 29, 2012 |
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Scientists isolate egg-producing stem cells from adult human ovaries
For the first time, Massachusetts General Hospital (MGH) researchers have isolated egg-producing stem cells from the ovaries of reproductive age women and shown these cells can produce what appear to be normal egg cells or ...
Medical research
Feb 26, 2012 |
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BPA alters development of in vitro ova and could increase risk of Down syndrome
Researchers at Universitat Autonoma de Barcelona analysed the effects of Bisphenol A (BPA), a polymer widely used to manufacture plastics, in an in vitro culture of ovaries. The research demonstrated that exposure to this ...
Health
Sep 21, 2011 |
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Could ovarian stimulation cause an increase in chromosome copy number abnormalities?
Ovarian stimulation undertaken by women of advanced maternal age receiving fertility treatment may be disrupting the normal pattern of meiosis -- a critical process of chromosome duplication followed by two specialized cell ...
Other
Jul 05, 2011 |
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