How is Klinefelters Syndrome Diagnosed?
This condition can be diagnosed before birth through amniocentesis or chorionic villus sampling (CVS). If the mother does not have an amniocentesis or CVS test, a small blood sample can be drawn from the child. White blood cells are then separated from the sample, mixed with tissue culture medium, incubated, and checked for chromosomal abnormalities, such as an extra X chromosome.