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What Is Klinefelter Syndrome Klinefelter syndrome is a genetic condition that can affect males as a result of the presence of an extra Klinefelter syndrome affects 1 in 650 male children.A normal person's genes consist of 46 chromosomes, two of which are sex chromosomes (XX for females and XY for males).However, this syndrome results from a defect in the stage of cell division for the formation of eggs in the mother or the formation of sperm in the father, so that the chromosomes at this stage are distributed unevenly among the eggs or sperm.The diagnosis of Klinefelter syndrome can be delayed until adulthood or later, and sometimes it may not be diagnosed at all.

What Is Klinefelter Syndrome
Klinefelter syndrome is a genetic condition that can affect males as a result of the presence of an extra Klinefelter syndrome affects 1 in 650 male children. The diagnosis of Klinefelter syndrome can be delayed until adulthood or later, and sometimes it may not be diagnosed at all. People with Klinefelter syndrome can benefit from modern reproductive technologies
Causes of Klinefelter syndrome :
Klinefelter syndrome results from a defect in a person's genes. A normal person's genes consist of 46 chromosomes, two of which are sex chromosomes (XX for females and XY for males). People with Klinefelter syndrome have 47 chromosomes, three of which are sex chromosomes (XXY)
Some people with Klinefelter syndrome (10% of them) have a defect in the number of chromosomes only in some of their cells, not all of them. In these people, the symptoms of Klinefelter syndrome vary according to the percentage of affected cells compared to normal cells.
Some people with this syndrome may happen to have 48 chromosomes, four of which are sex (XXXY). But this is a rare condition and more serious than other cases.
Although Klinefelter syndrome is caused by a gene defect, it is not a hereditary disease; That is, the son does not inherit it from the father. However, this syndrome results from a defect in the stage of cell division for the formation of eggs in the mother or the formation of sperm in the father, so that the chromosomes at this stage are distributed unevenly among the eggs or sperm.