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 ...

A stock's price-to-earnings ratio, or P/E ratio, is an expression of how expensive a stock is relative to the profits generated by the underlying company. Because of factors such as risk and growth ...

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 ...