Summary
During the past 6 years, 14 cytogenetic studies on human oocytes recovered during in vitro fertilization procedures have been published; they report contradictory results. The present survey has pooled the more than 1500 oocyte chromosome complements examined to date, in order to determine generalized trends in chromosomal abnormalities of female gametes. The overall frequency of abnormalities in mature oocytes is 24.0% with a large majority of aneuploidies (22.8%) over structural aberrations (1.2%), which could be explained by the difficulty in the detection of structural abnormalities in oocyte chromosome sets. An analysis of the distribution of non-disjunction among all chromosomes was also performed. In the A, C, D, and especially in the G groups, there is a significant difference between the observed non-disjunction and the frequencies expected from an equal partitioning of non-disjunction among all chromosomes. These data are discussed with reference to the differences obtained from cytogenetic studies on human sperm and from investigations on spontaneous abortion.
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Pellestor, F. Frequency and distribution of aneuploidy in human female gametes. Hum Genet 86, 283–288 (1991). https://doi.org/10.1007/BF00202410
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DOI: https://doi.org/10.1007/BF00202410