In two sets of procedures between October 2021 and February 2022 the BioRescue consortium created two new northern white embryos, bringing the total to 14. Oocytes (egg cells) were collected from northern white rhino Fatu ...
Plants & Animals
Feb 17, 2022
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130
By introducing a chemical cocktail to granulosa cells, researchers in China induced the cells to transform into functional oocytes in mice. Once fertilized, these oocytes were then successfully able to produce healthy offspring, ...
Cell & Microbiology
Dec 24, 2019
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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 for the highly ...
Cell & Microbiology
Aug 28, 2011
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From obesity to substance abuse, from anxiety to cancer, genetically modified mice are used extensively in research as models of human disease. Researchers often spend years developing a strain of mouse with the exact genetic ...
Biotechnology
Jun 26, 2013
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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 (EMBL) in Heidelberg, ...
Cell & Microbiology
Aug 18, 2011
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Preparing for a new baby can be a major upheaval for parents. But fortunately, most of the major biological groundwork for new life has already been completed much earlier in the parents' lives, even before their own birth.
Cell & Microbiology
Aug 22, 2022
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4
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 ...
Biochemistry
Feb 22, 2011
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A team of scientists from the Leibniz Institute for Zoo and Wildlife Research (Leibniz-IZW) inGermany, Givskud Zoo–Zootopia in Denmark and the University of Milan in Italy succeeded in producing the very first African lionin-vitroembryos ...
Biotechnology
Jan 18, 2021
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1097
Three years after starting its ambitious program to save the northern white rhino from extinction through advanced assisted reproduction technologies, the BioRescue consortium draws a positive interim conclusion: Following ...
Plants & Animals
Sep 7, 2022
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4
(Phys.org) —In February two Iberian lynx females who belong to the Iberian lynx Conservation Breeding Program (ILCBPS) were castrated in order to guarantee a better quality of life and prevent possible health problems.
Plants & Animals
Mar 23, 2013
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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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