Chromosome abnormalities are when there are mistakes or changes in our genetic material called chromosomes. These changes can cause health problems or differences in how our bodies develop and work. Full definition
The high incidence of chromosome abnormalities in clinically recognised pregnancies is well documented, but experience of these problems at the time of conception is extremely limited. (semanticscholar.org)
Scientists worry that although there hasn't been an obvious increase in birth defects so far, sex chromosome abnormalities may show up when the children reach puberty. (discovermagazine.com)
Similar tests can also be used during pregnancy to check for chromosome abnormalities in a developing embryo. (newscientist.com)