The term Klinefelter syndrome (KS) describes a group of chromosomal disorder in which there is at least one extra X chromosome to a normal male karyotype, 46,XY. XXY aneuploidy is the most common disorder of sex chromosomes in humans, with prevalence of one in 500 males. Other sex chromosomal aneuploidies have also been described, although they are much less frequent, with 48,XXYY and 48,XXXY b...

background: selecting the best embryo for transfer, with the highest chance of achieving a vital pregnancy, is a major goal in current in vitro fertilization (ivf) technology. the high rate of embryonic developmental arrest during ivf treatment is one of the limitations in achieving this goal. chromosomal abnormalities are possibly linked with chromosomal arrest and selection against abnormal f...