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Sex ratio at birth and racial differences: Why do Black women give birth to more females than non- Black women?

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The two important questions that this paper will attempt to answer are: (1) why is it that regardless of race/ethnicity or geographic location, the sex ratio data at birth show more males than females?; and (2) Why is it that regardless of geographic location compared to other racial/ethnic groups, Black women or Women of sub-Saharan Black African descent tend to give birth to more females? Or to put this question the other way around, compared to Black women, why do non-Black women give birth to more males? (Afr J Reprod Health 2008; 12[3]:139-150).


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