Image Credit: Rost9 / Shutterstock.com The normal male sex chromosomes are XY; in the case of Superman syndrome, males possess one additional Y chromosome in addition to the paternally inherited Y ...

Male fertility rates have been plummeting over the past half-century. An analysis from 1992 noted a steady decrease in sperm counts and quality since the 1940s. A more recent study found that male ...

Male fertility rates have been plummeting over the past half-century. An analysis from 1992 noted a steady decrease in sperm counts and quality since the 1940s. A more recent study found that male ...