The claims that unbalanced sex ratios are necessary due to sex selection have been questioned by some researchers. Department of Health and Human Services reported sex ratio at birth in the United States from over 62 years. Some authors argue that it is quite difficult to explain why this practice takes place in some cultures and not others, and that sex-selective abortion cannot be explained merely by patriarchal social norms, because most societies are male dominated, but only a minority practice sex-selective abortion.
James cautions that available scientific evidence stands against the above assumptions and conclusions. Department of Health and Human Services reported sex ratio at birth in the United States from over 62 years. Significant deviations in birth sex ratios from the normal range can only be explained by manipulation, that is sex-selective abortion.
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