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Reproductive endocrinology

Athletes' bodies, sexed bodies—intersexuality in athletics


In April 2011, the International Olympic Committee determined that women with hyperandrogenism and androgen levels above the lower limit of the male range cannot compete against other women. This attempt to implement a 'level playing field' has received much criticism. But is it justified?

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  1. International Olympic Committee. IOC addresses eligibility of female athletes with hyperandrogenism. [online], (2011).

  2. Dreger, A. Redefining the sexes in unequal terms. New York Times [online], (2011).

    Google Scholar 

  3. Crincoli, S. The IAAF hyperandrogenism regulations and discrimination. World Sports Law Rep. 9, 3–5 (2011).

    Google Scholar 

  4. Ostrander, E. A., Huson, H. J. & Ostrander, G. K. Genetics of athletic performance. Annu. Rev. Genomics Hum. Genet. 10, 407–429 (2009).

    Article  CAS  Google Scholar 

  5. Strauss, J. F. & Barbieri, R. L. Yen & Jaffe's Reproductive Endocrinology 4th edn (Saunders, Elsevier, 1999).

    Google Scholar 

  6. Enea, C., Boisseau, N., Fargeas-Gluck, M. A., Diaz, V. & Dugué, B. Circulating androgens in women: exercise-induced changes. Sports Med. 41, 1–15 (2011).

    Article  Google Scholar 

  7. New, M. I. Inborn errors of adrenal steroidogenesis. Mol. Cell. Endocrinol. 211, 75–83 (2003).

    Article  CAS  Google Scholar 

  8. McDowell, M. A., Fryar, C. D., Ogden, C. L. & Flegal, K. M. Anthropometric reference data for children and adults: United States, 2003–2006. Natl Health Stat. Report 10 [online], (2008).

    Google Scholar 

  9. Elsas, L. J. et al. Gender verification of female athletes. Genet. Med. 2, 249–254 (2000).

    Article  CAS  Google Scholar 

  10. Hines, M. Prenatal endocrine influence on sexual orientation and on sexually differentiated childhood behavior. Front. Neuroendocrinol. 32, 170–182 (2011).

    Article  CAS  Google Scholar 

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Correspondence to Eric Vilain.

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Competing interests

E. Vilain declares an association with the IOC Medical Commission (consultant). F. J. Sánchez declares no competing interests.

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Vilain, E., Sánchez, F. Athletes' bodies, sexed bodies—intersexuality in athletics. Nat Rev Endocrinol 8, 198–199 (2012).

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