Abstract
Chromosomal errors at the time of segregation or recombination during oocyte meiosis caused the most aneuploidies in humans. These abnormalities are related to cohesins and mitochondrial dysfunctions, telomeres shortening and meiotic spindle instability, mainly in women over 40 years old. However, several lines of evidence support the idea that aneuploidy is common and not a definitive ev…