Competition among human females likely contributed to concealed ovulation

Daily Mail - Science & tech 

Competition for mates between prehistoric human women may have contributed to'concealed ovulation' – a lack of any notable physical clues that a woman is fertile, experts say. Using computational models, US researchers found evidence that concealed ovulation in humans – which is unusual in the animal kingdom – evolved to allow women to hide their fertility status from other females. This would have helped avoid female conflict, perhaps driven by aggression towards potential rivals for male mates. Previously, scientists have thought women evolved to conceal ovulation from males to encourage them to help with looking after children. The new research shows that the origin of concealed ovulation might have actually have been much more female-oriented than previously thought. 'The study of human evolution has tended to look at things from a male perspective,' said senior study author Athena Aktipis, associate professor of psychology at Arizona State University in the US.