Klinefelter syndrome is a genetic disease characterized by the presence of two X chromosomes and one Y chromosome. Therefore, the karyotype of a male with Klinefelter syndrome would be 47, XXY; instead of 46, XY.
In addition, there are variants of Klinefelter syndrome, although their incidence is lower. Examples are karyotypes 48, XXXY or 49, XXXXY.
Read the full article on: Klinefelter Syndrome (XXY Syndrome) – Symptoms, Causes & Fertility ( 30).
By Estefanía Rodríguez Ferradas M.D., M.Sc., Ph.D. (gynecologist), José Luis de Pablo B.Sc., M.Sc., Ph.D. (senior clinical embryologist), Zaira Salvador B.Sc., M.Sc. (embryologist) and Sandra Fernández B.A., M.A. (fertility counselor).
Last Update: 03/04/2024
