Prenatal detection of the 47, XYY karyotype.

The ethical decisions involved before and after the prenatal diagnosis of a 47, XYY karyotype in the fetus of a 32-year-old woman are discussed. It was decided that the parents should be presented with all the known facts about XYY-associated abnormalities and allowed to choose whether pregnancy should continue; the physician's role would be to support them in their decision and help them carry it out.