Signs and Symptoms of Klinefelter Syndrome

According to the U.S. National Library of Medicine, Klinefelter syndrome is a condition that adds an extra X-chromosome to a male's genetic make-up. Klinefelter syndrome is only found in males, and it occurs in approximately 1 in every 500 American males.
  1. Motor Skills

    • The added X-chromosome may slow motor development in male children, causing delays in crawling and walking.

    Infertility

    • According to Medicinenet.com, nearly 99 percent of the males afflicted with Klinefelter syndrome are infertile because they are unable to produce an adequate amount of sperm.

    Appearance

    • Males with Klinefelter syndrome tend to be taller and grow less facial hair than males without the condition. Klinefelter syndrome can also increase the probability that these males will develop a weight problem as they age.

    Breast Symptoms

    • Klinefelter syndrome can cause the male's breasts to become tender to the touch, and it can also increase the odds of breast cancer.

    Intellectual Development

    • Males with Klinefelter syndrome tend to take longer to learn to read and write. They display normal levels of intelligence, but these levels develop later.

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