منابع مشابه
The development of XO gynogenetic mouse embryos.
Diploid gynogenetic embryos, which have two sets of maternal and no paternal chromosomes, die at or soon after implantation. Since normal female embryos preferentially inactivate the paternally derived X chromosome in certain extraembryonic membranes, the inviability of diploid gynogenetic embryos might be due to difficulties in achieving an equivalent inactivation of one of their two maternall...
متن کاملStudying Early Lethality of 45,XO (Turner's Syndrome) Embryos Using Human Embryonic Stem Cells
Turner's syndrome (caused by monosomy of chromosome X) is one of the most common chromosomal abnormalities in females. Although 3% of all pregnancies start with XO embryos, 99% of these pregnancies terminate spontaneously during the first trimester. The common genetic explanation for the early lethality of monosomy X embryos, as well as the phenotype of surviving individuals is haploinsufficien...
متن کاملThe Effect of Prolonged Culture of Chromosomally Abnormal Human Embryos on The Rate of Diploid Cells
Background A decrease in aneuploidy rate following a prolonged co-culture of human blastocysts has been reported. As co-culture is not routinely used in assisted reproductive technology, the present study aimed to evaluate the effect of the prolonged single culture on the rate of diploid cells in human embryos with aneuploidies. MaterialsAndMethods In this cohort study, we used fluorescence in ...
متن کاملsecuritization of mortality risks in life annuities
insurers have in the past few decades faced longevity risks - the risk that annuitants survive more than expected - and therefore need a new approach to manage this new risk. in this dissertation we survey methods that hedge longevity risks. these methods use securitization to manage risk, so using modern financial and insurance pricing models, especially wang transform and actuarial concepts, ...
15 صفحه اولCaffeine effects on the Mortality of Embryos
Caffeine is a controversial drug found in many drinks such as sodas, teas, and coffees. The purpose of this experiment was to test the effects of caffeine on the mortality rate of zebrafish embryos. To execute this experiment, 40 zebrafish embryos were divided and placed into four different solutions containing differing amounts of caffeine. The four solutions were a 0.0 mg/mL or control soluti...
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ژورنال
عنوان ژورنال: Reproduction
سال: 1973
ISSN: 1470-1626,1741-7899
DOI: 10.1530/jrf.0.0340051