Secular trends in sex ratios at birth in South America over the second half of the 20th century

Objectives: Latitude gradients have been found in the male-female ratio at birth (M/F: male divided by total births), which is anticipated to be 0.515. Methods: Annual national male and female live births by country were obtained for South America from the World Health Organization (WHO) and analyse...

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Autor principal: Victor Grech (Autor)
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Publicado: Elsevier, 2013-09-01T00:00:00Z.
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