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Comment
. 2015 Apr 21;112(16):4839-40.
doi: 10.1073/pnas.1505165112. Epub 2015 Apr 6.

The human prenatal sex ratio: A major surprise

Steven N Austad  1
Affiliations
Comment

The human prenatal sex ratio: A major surprise

Steven N Austad. Proc Natl Acad Sci U S A. .
No abstract available

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Conflict of interest statement

The author declares no conflict of interest.

Figures

Fig. 1.
Fig. 1.
(A) Stability of the sex ratio at birth in the United States over 60 y (–17). (B) Percent males from birth to age 100 y in diverse historical populations with excellent birth and death records. Data from birth cohort life tables from ref. . The question mark denotes that before Orzack, et al. (9), little was known about sex ratio during most of gestational life.
See this image and copyright information in PMC

Comment on

  • The human sex ratio from conception to birth.
    Orzack SH, Stubblefield JW, Akmaev VR, Colls P, Munné S, Scholl T, Steinsaltz D, Zuckerman JE. Orzack SH, et al. Proc Natl Acad Sci U S A. 2015 Apr 21;112(16):E2102-11. doi: 10.1073/pnas.1416546112. Epub 2015 Mar 30. Proc Natl Acad Sci U S A. 2015. PMID: 25825766 Free PMC article.

References

    1. Austad SN. Sex differences in longevity and aging. In: Masoro EJ, Austad SN, editors. The Handbook of the Biology of Aging. 7th Ed. Academic; San Diego: 2011. pp. 479–496.
    1. Jacobsen R, Møller H, Mouritsen A. Natural variation in the human sex ratio. Hum Reprod. 1999;14(12):3120–3125. - PubMed
    1. Poston DL, Glover K. Too many males: Marriage market implications of gender imbalances in China. Genus. 2005;61(2):119–140.
    1. Sahni M, et al. Missing girls in India: Infanticide, feticide and made-to-order pregnancies? Insights from hospital-based sex-ratio-at-birth over the last century. PLoS ONE. 2008;3(5):e2224. - PMC - PubMed
    1. Shkolnikov VM, Wilmoth J. 2015. Human Mortality Database. (Univ of California, Berkeley and Max Planck Institute for Demographic Research, Germany). Available at www.mortality.org and www.humanmortality.de. Accessed March 14, 2015.

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