Ray and colleagues1 present data on variation in birth sex ratios among Ontario newborns, showing a significant male-biased sex ratio at birth among multiparous Indian and South Korean mothers. The ...

Biostatisticians have developed a new estimation method for assessing natural variations in the sex ratio at birth (SRB) for all countries in the world. An international team of researchers, led by ...

This is a preview. Log in through your library . Abstract We investigated the effects of maternal weight and age and density of breeding females on sex ratio (percentage of males) in litters of wild ...

Phenotypic diversity is not uniformly distributed, but how biased patterns of evolutionary variation are generated and whether common developmental mechanisms are responsible remains debatable.

An international team of researchers, led by UMass Amherst biostatistician Leontine Alkema and her former Ph.D. student Fengqing Chao, developed a new estimation method for assessing natural ...