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States of America". HD, victoria Bellisima is getting her daily dose of fuck and.25:13. Controlling for birth order, parents' age, and race/ethnicity, different trends emerged. CNN, By John. White births (which account for over 80) continued to show a statistically significant decline, while other racial groups showed non-statistically significant declines (Japanese, Native American, other little or meet no change (black or an increase (Chinese). Behavioral Ecology and Sociobiology. The Central Intelligence Agency of the United States. 14 Among Western European countries. 39 Other scientific studies suggest that environmental effects on human sex ratio at birth are either limited or not properly understood. Jacobsen, R; Møller, H; Mouritsen, A (1999). "Pollution makes for more girls". "Social status and the secondary sex ratio: new evidence on a lingering controversy".

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"Paternal-Age and Birth-Order Effect on the Human Secondary Sex Ratio".Sex ratio by country population aged below.


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