"Super Sperm - An Evolutionary Reason For Infertility?"

"'The rate of human infertility is higher than we should expect it to be,' says Dr. Hasson. 'By now, evolution should have improved our reproductive success rate. Something else is going on.' Combining empirical evidence with a mathematical model developed in cooperation with Prof. Lewi Stone of the department's Biomathematics Unit, the researchers suggest that the bodies of men and women have become reproductive antagonists, not reproductive partners. The conclusions of this research were published recently in the journal Biological Reviews."