A mysterious worldwide epidemic reduces the birthrate of female infants from 50 percent to less than 1 percent. (goodereader.com)
Ancient Mesopotamian culture also placed a higher value on male children, and death from exposure was a common fate for unwanted female infants. (motherhoodinpointoffact.com)
Adibi and colleagues found that higher levels of hCG in the mothers» blood were strongly associated with a lower anogenital distance in male babies (specifically the distance from the anus to the scrotum), but not in female infants. (sciencedaily.com)