Sex-ratio at birth in Nigeria: A demographic perspective
Abstract
The study attempts at estimating the sex-ratio at birth in Nigeria. The study focuses on demographic surveys with complete maternity histories, including some 0.50 million births. It compares results with published estimates from births in health facilities and a few data from vital registration, including some 1.13 million births. Results from demographic surveys give an estimate of about 106 boys for 100 girls. There were no significant variations by large region in the country, and no significant trend over the years (1990-2018). Published estimates provided a similar value (106.2), with somewhat lower value in health facilities (105.3), and somewhat higher values in local vital registration (106.8), and major variations among available studies. Despite uncertainty, Nigeria appears to have higher sex-ratios than most African countries, with the exception of Ethiopia, and higher values than its five neighboring countries. Reasons for these high values of the secondary sex-ratio are discussed. (Afr J Reprod Health 2022; 26[4]: 92-97).
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Süssmilch JP. Die Göttliche Ordnung (second edition, 1761). [Translated in French by Hecht J. L’ordredivin aux origines de la démographie. Paris, INED, 1979]
United Nations, Demographic Yearbook. (Various issues: 1949-2018). New-York, United Nations.
Ciocco A. Variations in the sex-ratio at birth in the United States. Hum Biol 1938; 10: 36-64.
Erickson JD. The secondary sex ratio in the United States 1969-71: association with race, parental ages, birth order, paternal education and legitimacy. Ann Hum Genet 1976; 40(2): 205-212.
Khoury MJ, Erickson JD and James LM. Paternal effects on the human sex-ratio at birth: evidence from interracial crosses. Am J Hum Genet 1984; 36(5): 1103-1111.
James WH. The sex-ratios of black births. Ann Hum Biol 1984; 11(1): 39-44.
Visaria P. Sex-ratio at birth in territories with relatively complete registration. Eugen Q 1967; 14(2): 132-142.
Romaniuk A. The demography of the Democratic Republic of the Congo. Chapter 6 in: W. Brass, A.J. Coale, P. Demeny, D.F. Heisel, F. Lorimer, A. Romaniuk, and E. van de Walle (Eds.). The Demography of Tropical Africa. Princeton, NJ, Princeton University Press, 1968, 278-281.
Van de Walle E. Characteristics of African demographic data. Chapter 2 in: W. Brass, A.J. Coale, P. Demeny, D.F. Heisel, F. Lorimer, A. Romaniuk, and E. van de Walle (Eds.). The Demography of Tropical Africa. Princeton, NJ, Princeton University Press, 1968, 38-43.
Garenne M. Sex-ratios at birth in African populations: a review of survey data. Hum Biol 2002; 74(6): 889-900.
Garenne M. Sex-ratios at birth in populations of Eastern and Southern Africa. South Afr J of Demogr 2004; 9(1):91-96.
Clark S, Colson E, Lee J and Scudder T. Ten thousand Tonga: a longitudinal anthropological study from southern Zambia, 1956-1991. Pop Stud-J Demog (UK); 49(1): 91-109.
SAPRIN data repository. (2020). http://saprindata.samrc.ac.za/index.php
Garenne M. The enigma of Ethiopian sex-ratios at birth. J Biosoc Sci 2017; 49(5): 611-622.
Garenne M. Trends in nutritional status of adult women in sub-Saharan Africa. DHS Comparative Reports 2011, No 27. Calverton, Maryland, USA: ICF Macro.
Ayeni O. Sex-ratio of live births in southwestern Nigeria. Ann Hum Biol 1975; 29(2):137–41.
Azeez MA, Akinboro A and Bakare AA. Human sex-ratio at birth in South West Nigeria. Indian J Hum Genet 2007;13(2):59-64.
Boroffice RA. Human sex-ratio in Nigeria: Secondary sex-ratio of live births. Nig J Nat Sci 1979; 1:99–102.
Egwuatu VE. The sex-ratio of Igbo births. Int J Gynecol Obstet 1984; 22(5): 399–402.
Eneni NO, Mukoro GD and Tabowei B. Trend of male-female birth ratio in a south-south Nigerian teaching hospital. Internet J Health 2013; 14(1).
Mosuro AA. Sex-ratio of live births in South-West Nigeria. J Sci Res 1997; 3:113–117.
Oyeniyi T. Secondary sex-ratio in a south-western Nigerian town. Int J Genet 2012; 4: 92-94.
Rehan NE. Sex-ratio of live-born Hausa infants. Br J Obstet Gynecol 1982; 89(2):136–141.
Sule ST and Madugu HN. Sex-ratio at birth in Zaria, Nigeria. Ann Hum Biol 2004; 31(2): 258-262.
DHS-program (web site): https://dhsprogram.com/
Schlebusch CM and Jakobsson M. Tales of human migration, admixture, and selection in Africa. Annu Rev Genomics Hum Genet. 2018 Aug 31; 19:405-428.
Choudhury A, Aron S, Sengupta D, Hazelhurst S and Ramsay M. African genetic diversity provides novel insights into evolutionary history and local adaptations. Hum Mol Genet. 2018 Aug 1;27(R2):R209-R218.
Haber M, Mezzavilla M, Bergström A, Prado-Martinez J, Hallast P, Saif-Ali R, Al-Habori M, Dedoussis G, Zeggini E, Blue-Smith J, Wells RS, Xue Y, Zalloua PA and Tyler-Smith C. Chad genetic diversity reveals an African history marked by multiple Holocene Eurasian migrations. Am J Hum Genet. 2016 Dec 1; 99(6):1316-1324.
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