Which reproductive finding is typical in Klinefelter syndrome?

Which reproductive finding is typical in Klinefelter syndrome?

• A. Azoospermia
• B. Oligospermia
• C. Normal fertility
• D. Hypergonadism

Answer: (A)

Klinefelter syndrome causes testicular failure with impaired spermatogenesis due to the extra X chromosome (47,XXY). The seminiferous tubules undergo hyalinization and germ cell development is disrupted, leading to infertility. The reproductive finding that is typical is azoospermia—no sperm in the ejaculate. While some men may have very low sperm counts, the classic presentation is azoospermia. Normal fertility would not occur, and hypergonadism is inconsistent because this condition usually features hypogonadism with low testosterone (often with elevated FSH).

Klinefelter syndrome causes testicular failure with impaired spermatogenesis due to the extra X chromosome (47,XXY). The seminiferous tubules undergo hyalinization and germ cell development is disrupted, leading to infertility. The reproductive finding that is typical is azoospermia—no sperm in the ejaculate. While some men may have very low sperm counts, the classic presentation is azoospermia. Normal fertility would not occur, and hypergonadism is inconsistent because this condition usually features hypogonadism with low testosterone (often with elevated FSH).