KS is diagnosed by the genetic test known as a karyotype. The syndrome is defined by the presence of at least one extra X chromosome in addition to a Y chromosome yielding a total of 47 or more chromosomes rather than the usual 46. An older mother may have a slightly increased risk of a child with KS. The extra X chromosome comes from the father and mother nearly equally. Intelligence is usually normal, but reading difficulties and problems with speech are more common. Often, these symptoms are noticed only at puberty. ![]() Sometimes, symptoms are more evident and may include weaker muscles, greater height, poor motor coordination, less body hair, breast growth, and less interest in sex. Usually, symptoms are subtle and subjects do not realize they are affected. The primary features are infertility and small, poorly functioning testicles. ![]() Klinefelter syndrome ( KS), also known as 47,XXY, is a syndrome where a male has an additional copy of the X chromosome. ![]() Physical therapy, speech and language therapy, counseling Infertility, autoimmune disorders, breast cancer, venous thromboembolic disease, osteoporosis Above average height, weaker muscles, poor coordination, less body hair, breast growth, less interest in sex, infertility.
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