The sex ratio at birth (SRB) has risen in India and reaches well beyond the levels under normal circumstances since the 1970s. The lasting imbalanced SRB has resulted in much more males than females in India. A population with severely distorted sex ratio is more likely to have prolonged str...
The sex ratio of white births was consistently higher than that for nonwhite births--a finding which is consistent with earlier studies. Part of the racial differences can perhaps be explained by differences in socioeconomic environment. For the moment, the differential white-nonwhite sex ratio ...
The current US national total-population sex ratio is 0.97 male (s)/female with an at-birth sex ratio of 1.05 male (s)/female; comparatively, the results from anesthesia providers' survey respondents (n= 314) were a total OSR of 0.93 male (s)/female (P= 0.61) with firstborn OSR ...
Toward a Geography of Hormones: The Human Sex Ratio at Birth in the United States 1970-1995 来自 Semantic Scholar 喜欢 0 阅读量: 26 作者: M. Meyers 摘要: It has been hypothesized that humans may exert facultative, adaptive control over the sex of their offspring through the action of the...