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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| Aineistotyyppi: | Kirja |
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Elsevier,
2013-09-01T00:00:00Z.
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Internet
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A1234.567 |
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| Nide 1 | Saatavissa |