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Klinefelter Syndrome
There are cases of Klinefelter Syndrome patients producing pockets of sperm and going on to father biological children.
When presented with a diagnosis of azoospermia, a man faces an assortment of tests that will attempt to determine the cause of the absence of sperm in his ejaculate. One such test will be a karyotype, which shows the chromosomal characteristics of a cell. The doctor is looking for a chromosomal abnormality that could be the cause of the azoospermia. Klinefelter Syndrome is one such chromosomal abnormality that can cause azoospermia.
Klinefelter Syndrome occurs when a man has a 47XXY karyotype instead of the typical 46XY karyotype for a male. Klinefelter Syndrome affects 1 in 500 to 1,000 males. This condition randomly occurs when the reproductive cells fail to divide properly, leaving either the egg or sperm with an abnormal chromosomal makeup. Klinefelter Syndrome is not hereditary.
Some symptoms, other than the inability to produce sperm, include decreased facial and body hair; small testes; gynecomastia (enlarged breast tissue); being taller than other males their age; having learning disabilities as a child; and a tendency towards sensitivity and shyness. Of course, all of these symptoms may not be present in every male with Klinefelter Syndrome.
There are cases of Klinefelter Syndrome patients producing pockets of sperm and going on to father biological children. The sperm would have to be found and extracted through microdissection testicular sperm extraction and then, if viable, injected into the woman’s egg during an IVF cycle.