[Chromosome aberrations in the etiology of abortions after infertility treatment using IVF and ET]

Chromosomal aberrations are a frequent cause of miscarriages during the first trimester of gestation. The most frequent finding in the authors group was trisomy 16 (in five patients). After extracorporeal fertilization (IVF) the percentage of abnormal karyotypes does not increase, the main risk factor being the women's age.