Hostname: page-component-586b7cd67f-rdxmf Total loading time: 0 Render date: 2024-11-20T09:31:56.589Z Has data issue: false hasContentIssue false

THE ENIGMA OF ETHIOPIAN SEX RATIOS AT BIRTH

Published online by Cambridge University Press:  11 August 2016

Michel Garenne*
Affiliation:
Institut de Recherche pour le Développement (IRD), Bondy, France Institut Pasteur, Epidémiologie des Maladies Emergentes, Paris, France MRC/Wits Rural Public Health and Health Transitions Research Unit, School of Public Health, University of the Witwatersrand, Johannesburg, South Africa

Summary

This study analysed sex ratios at birth (defined as the number of male births per 100 female births) using data on children ever-born from three censuses conducted in Ethiopia in 1984, 1994 and 2007. The results showed very high values by any standard, with an average of 108.4 for a sample of some 8.2 million births, with somewhat lower values in urban areas. Analysis of socioeconomic correlates revealed that the sex ratio varied very much by household wealth, from about 110 for very poor women to about 102 for wealthier women. The high value of the sex ratio at birth in Ethiopia could be explained by poverty, used as a proxy for poor nutritional status. In multivariate analysis, the effects of living in urban areas and of maternal education were less important than household wealth. Among the many ethno-linguistic groups, the Nilotic family had higher sex ratios than other groups. The results were confirmed using data from DHS surveys conducted in the country, and by the analysis of children still living at time of census.

Type
Research Article
Copyright
Copyright © Cambridge University Press, 2016 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Adamets, S. (2002) Famine in nineteenth and twentieth century Russia: mortality by age, cause and gender. In Dyson, T. & O’Grada, C. (eds) Famine Demography: Perspectives from the Past and Present. Oxford University Press.Google Scholar
Andersson, R. & Bergström, S. (1998) Is maternal malnutrition associated with a low sex ratio at birth? Human Biology 70(6), 11011106.Google Scholar
Ansari-Lari, M. & Saadat, M. (2002) Changing sex ratio in Iran, 1976–2000. Journal of Epidemiology and Community Health 56, 622623.Google Scholar
Aubenque, M. (1989) Indice de masculinité à la naissance: aperçu rétrospectif et commentaires. Journal de la Société Statistique de Paris 130, 80102.Google Scholar
Catalano, R., Bruckner, T., Gould, J., Eskenazi, B. & Anderson, B. (2005) Sex ratios in California following the terrorist attacks of September 11th 2001. Human Reproduction 20, 11211227.Google Scholar
Catalano, R., Bruckner, T., Marks, A. R. & Eskenazi, B. (2006) Exogenous shocks to the human sex ratio: the case of September 11, 2001 in New York City. Human Reproduction 21(12), 31273131.CrossRefGoogle Scholar
Ciocco, A. (1938) Variations in the ratio at birth in USA. Human Biology 10, 3664.Google Scholar
Chahnazarian, A. (1988) Determinants of the sex ratio at birth: review of recent literature. Social Biology 35(3–4), 214235.Google Scholar
DHS Program (no date) URL: http://dhsprogram.com/ (accessed 8th January 2016).Google Scholar
Edwards, A. W. F. (1958) An analysis of Geissler’s data on the human sex ratio. Annals of Human Genetics 23(1), 615.Google Scholar
Fellman, J. (2015) Glimpses at the history of sex ratio studies. Science Journal of Public Health 3(2), 291302.Google Scholar
Fukuda, M., Fukuda, K., Shimizu, T. & Møller, H. (1998) Decline in sex ratio at birth after Kobe earthquake. Human Reproduction 13(8), 23212322.CrossRefGoogle ScholarPubMed
Garenne, M. (2002) Sex ratios at birth in African populations: a review of survey data. Human Biology 74(6), 889900.Google Scholar
Garenne, M. (2004) Sex ratios at birth in populations of Eastern and Southern Africa. Southern African Journal of Demography 9(1), 9196.Google Scholar
Garenne, M. (2008) Poisson variations of the sex ratio at birth in African demographic surveys. Human Biology 80(5), 473482.Google Scholar
Garenne, M. (2009) Heterogeneity in the sex ratio in European populations. Genus 64(3–4), 99108.Google Scholar
Garenne, M. (2015) Traditional wealth, modern goods and demographic behavior in rural Senegal. World Development 72, 267276.CrossRefGoogle Scholar
Garenne, M. & Hohmann, S. (2003) A wealth index to screen high risk families: application to Morocco. Journal of Health, Population and Nutrition 21(3), 235242.Google Scholar
Geissler, A. (1889) Beitrage zur Frage des Geschlechtsverhältnisses der Geboren. Zeitschrift des Königlishen Sächsishen Statistischen Bureaus XXXV, 124.Google Scholar
Gini, C. (1951) Combinations and sequences of sexes in human families and mammal litters. A review of literature with comments and some new results. Acta Genetica et Statistica Medica 2, 220244.Google Scholar
Graffelman, J. & Hoekstra, R. (2000) A statistical analysis of the effect of warfare on the human secondary sex ratio. Human Biology 72, 433445.Google Scholar
Hohmann, S. & Garenne, M. (2010) Health and wealth in Uzbekistan and sub-Saharan Africa in comparative perspective. Economics and Human Biology 8(3), 346360.Google Scholar
Hohmann, S. & Garenne, M. (2011) Absolute versus relative measures of poverty. Application to DHS African surveys. Journal of US–China Public Administration 8(7), 748762.Google Scholar
Hohmann, S., Roche, S. & Garenne, M. (2010) Changing sex ratios at birth during the civil war in Tajikistan: 1992–1997. Journal of Biosocial Science 42(6), 773786.CrossRefGoogle ScholarPubMed
IPUMS (no date) Census Microdata for Social and Economic Research. Integrated Public Use Microdata Series, International. URL: https://international.ipums.org (accessed 4th January 2016).Google Scholar
James, W. H. (1984) The sex ratios of black births. Annals of Human Biology 11(1), 3944.CrossRefGoogle ScholarPubMed
James, W. H. (1987) The human sex ratio. Part 1: A review of the literature. Human Biology 59(5), 721752.Google Scholar
James, W. H. (2000) Analysing data on the sex ratio of human births by cycle day of conception. Human Reproduction 15(5), 12061208.CrossRefGoogle ScholarPubMed
James, W. H. (2009) The variations of human sex ratio during and after wars, and their potential explanations. Journal of Theoretical Biology 257, 116123.Google Scholar
Khoury, M. J., Erickson, J. D. & James, L. M. (1984) Paternal effects on the human sex ratio at birth: evidence from interracial crosses. American Journal of Human Genetics 36(5), 11031111.Google ScholarPubMed
MacIntyre, K. (2002) Famine and the female mortality advantage. In Dyson, T. & Gráda, C. Ó. (eds) Famine Demography: Perspectives from the Past and Present. Oxford University Press.Google Scholar
Mackenzie, C. A., Lockridge, A. & Keith, M. (2005) Declining sex ratio in a first nation community. Environmental Health Perspective 113, 12951298.CrossRefGoogle Scholar
Pagani, L., Kivisild, T., Tarekegn, A., Ekong, R., Plaster, C., Gallego-Romero, I. et al. (2012) Ethiopian genetic diversity reveals linguistic stratification and complex influences on the Ethiopian gene pool. American Journal of Human Genetics 91(1), 8396.Google Scholar
Polasek, O. (2006) Did the 1991–1995 wars in the former Yugoslavia affect sex ratio at birth? European Journal of Epidemiology 21(1), 6164.Google Scholar
Polasek, O., Kolcic, I. & Rudan, I. (2005) Sex ratio at birth and war in Croatia (1991–1995) Human Reproduction 20(9), 24892491.CrossRefGoogle ScholarPubMed
Saadat, M. (2006) Change in sex ratio at birth in Sardasht (North West of Iran) after chemical bombardment. Journal of Epidemiology and Community Health 60(2), 183.Google Scholar
Saadat, M. & Ansari-Lari, M. (2004) Sex ratio of birth during wartime and psychological tensions. Human Reproduction 19(2), 465.Google Scholar
Seth, M. (2010) A History of Korea: From Antiquity to the Present. Rowman & Littlefield Publishers.Google Scholar
Stein, A. D., Barnett, P. G. & Sellen, D. W. (2004) Maternal undernutrition and the sex ratio at birth in Ethiopia: evidence from a national sample. Proceedings of the Royal Society of London, Series B (Supplement) 271, S37S39.Google Scholar
Süssmilch, J. P. (1761) Die Göttliche Ordnung. 2nd edition. Translated by Jacqueline Hecht (1979) L’ordre divin aux origines de la démographie. INED, Paris.Google Scholar
Teitelbaum, M. S. (1970) Factors affecting the sex ratio in large populations. Journal of Biosocial Science (Supplement 2), 6171.CrossRefGoogle ScholarPubMed
Visaria, P. (1967) Sex ratio at birth in territories with relatively complete registration. Eugenics Quarterly 14, 132142.Google Scholar
Zorn, B., Sucur, V., Stare, J. & Meden-Vrtovec, H. (2002) Decline in sex ratio at birth after 10-day war in Slovenia: brief communication. Human Reproduction 17(12), 31733177.CrossRefGoogle ScholarPubMed