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Decline in sex ratio at birth after Kobe earthquake.

Decline in sex ratio at birth after Kobe earthquake. Abstract We investigated the possible association between the Kobe earthquake (January 1995) and the sex ratio among live-born infants after the catastrophe. A significant decline in the sex ratio (0.501) of Hyogo Prefecture in October 1995 was observed 9 months after the Kobe earthquake as compared with an expected value of 0.516 in the period from January 1993 to January 1996 (P = 0.04; one-tailed). Simultaneously, a reduction in fertility of approximately 6% was also observed, compared with the month of October 2 years previously. Thus, the acute stress resulting from a great natural catastrophe can be a cause of a low sex ratio at birth 9 months later. Asia, Birth Rate, Demographic Factors, Developed Countries, Eastern Asia, Environment, Fertility, Fertility Measurements, Japan, Natural Disaster, Population, Population Characteristics, Population Dynamics, Research Report, Sex Distribution, Sex Factors, Sex Ratio http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Human Reproduction Oxford University Press

Decline in sex ratio at birth after Kobe earthquake.

Human Reproduction , Volume 13 (8) – Aug 1, 1998

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References (10)

Publisher
Oxford University Press
ISSN
0268-1161
eISSN
1460-2350
DOI
10.1093/humrep/13.8.2321
Publisher site
See Article on Publisher Site

Abstract

Abstract We investigated the possible association between the Kobe earthquake (January 1995) and the sex ratio among live-born infants after the catastrophe. A significant decline in the sex ratio (0.501) of Hyogo Prefecture in October 1995 was observed 9 months after the Kobe earthquake as compared with an expected value of 0.516 in the period from January 1993 to January 1996 (P = 0.04; one-tailed). Simultaneously, a reduction in fertility of approximately 6% was also observed, compared with the month of October 2 years previously. Thus, the acute stress resulting from a great natural catastrophe can be a cause of a low sex ratio at birth 9 months later. Asia, Birth Rate, Demographic Factors, Developed Countries, Eastern Asia, Environment, Fertility, Fertility Measurements, Japan, Natural Disaster, Population, Population Characteristics, Population Dynamics, Research Report, Sex Distribution, Sex Factors, Sex Ratio

Journal

Human ReproductionOxford University Press

Published: Aug 1, 1998

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