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- W2113292154 abstract "Background: Down’s syndrome (DS) is the most common autosomal aneuploidy in human beings and is characterized by a complex phenotype including characteristic facial features, skeletal appearance and it is most commonly diagnosed congenital malformation/ mental retardation syndrome. Although advanced maternal age is a well established risk factor for the etiology of DS, controversy over it still continues. Objective: The study was carried out to find the effect of maternal age in the etiology of trisomy-21. Material and methods: Present study has been conducted on DS cases from various districts of Haryana State. DS cases were subjected to detailed morphological and cytogenetic analysis. Results: In the present study more than eighty percent of DS children were born to young mother’s of 35 years. DS cases born to mother’s of age less than 30 years were 69.5%. Mean age of mother was 29.5 years. Partial correlation coefficient between mother’s age and number of DS cases (keeping father age constant) was calculated as r = 0.315. Conclusion: Present study is not in favour of the effect of advanced maternal age on the occurrence of DS child. It can be concluded that risk of DS cases is not only due to the advanced maternal age and some others factors (genetic and environmental) may be involved in the formation of a trisomic zygote. Future studies are required to investigate the various factors that regulate the segregation & recombination in humans." @default.
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- W2113292154 date "2013-01-01" @default.
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- W2113292154 title "Maternal age: a controversial factor in trisomy 21" @default.
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