The human sex ratio is the ratio of males to females in a population. Global sex ratio records at birth consistently suggest that boys naturally outnumber girls at birth. Researchers at Harvard University and Oxford University analyzed the largest dataset from United States to explain the human sex ratio, which has been poorly understood until now. Their findings suggest that boys and girls are equal in number at conception, but more female fetuses die during pregnancy, leading ...
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titled Males and Females Equal During Conception but More Female Fetuses Die During Pregnanacy.
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editor - Tuesday, March 31, 2015
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