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sex ratio
(redirected from Birth ratio)

    Also found in: Wikipedia 0.03 sec.
sex ratio
n.
1. The proportion of males to females in a given population, usually expressed as the number of males per 100 females at a specific stage in life, especially at conception, birth, and a given stage between birth and death.
2. The ratio of the numbers of males to females affected by a particular disease or trait.
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? Mentioned in ? References in periodicals archive
 
Demographic and behavioral determinants of male-to-female birth ratio in Spain from 1981 to 1997.
Declines in sex ratio at birth and fetal deaths in Japan, and in U.S. ... by Doi, Rikuo / Environmental Health Perspectives
The male-to-female birth ratio is higher in the northern latitudes than in the southern latitudes of North America, but the reverse is true of Europe.
Male-to-female birth ratios opposite in Europe and North America by Southern Medical Journal
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