47,XYY disorder is described by an additional duplicate of the Y chromosome in every one of a male’s cells. Although numerous guys with this condition are taller than normal, the chromosomal change some of the time causes no abnormal physical highlights. Most guys with 47,XYY disorder have ordinary levels of the male sex hormone testosterone and sexual activities, and they are normally able to father kids.
A diagnosis of XYY syndrome is made dependent on a careful clinical assessment, a
detailed patient history, and specific tests (i.e., chromosomal tests).
A diagnosis of XYY disorder might be made before birth (prenatally) through amniocentesis or chorionic villus testing (CVS). During amniocentesis, a sample of liquid that encompasses the fetus is removed and investigated, while CVS includes the removal of tissue samples from a segment of the placenta. Chromosomal tests performed on such liquid or tissue tests may uncover the possibility of an additional Y chromosome.