نتایج جستجو برای: chromosome abnormality
تعداد نتایج: 257024 فیلتر نتایج به سال:
chromosomal abnormalities are major causes of infertility, miscarriage and birth of handicapped progeny. in human live births, the prevalence of a chromosome aberration is ?0.5% and, of these, 0.1–0.3% correspond to structural chromosome rearrangements such as translocations, inversions, insertions and deletions .our proband is an infant who had died 4 hours after birth due to a variety of abno...
introduction: the incidence of chromosomal abnormalities was investigated in untransfered embryos reuslted from in vitro fertilization (ivf) or intracytoplasmic sperm injection (icsi) procedures. materials and methods: a total of 238 embryos of varying morphology between the pronucleated stage and 8-cells were analysed. the cytogenetic method of dyban was used for chromosome preparation. embryo...
OBJECTIVE To study the prevalence of chromosomal abnormalities and FMR1 gene premutation in Chinese women with premature menopause in Hong Kong. DESIGN Retrospective study. SETTING Clinical Genetic Service, Hong Kong. PARTICIPANTS Chinese women with premature menopause referred for cytogenetic study from January 1983 to November 2003. MAIN OUTCOME MEASURES Chromosomal abnormalities, FMR...
In a review of 432 children with newly diagnosed acute lymphoblastic leukemia (ALL), we identified a new nonrandom translocation. tdic(9;12)(pl ?1 ;pl ?2). in the leukemic marrow cells of eight patients. Seven had hypodiploid karyotypes that lacked chromosomes 9 and 1 2 and contamed a der(12), tdic(9;12); the eighth had a pseudodiploid karyotype with two normal 9 chromosomes, one normal 12 and ...
Using comparative genomic hybridization, we have detected chromosome abnormality in 76/126 (60%) single blastomeres biopsied prior to implantation from embryos from 20 women with repeated implantation failure following IVF. The abnormalities detected included aneuploidy for one or two chromosomes [32/126 (25%)] and complex chromosomal abnormality [37/126 (29%)]. Most of the chromosomes involved...
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