Women are more attracted to flirtatious faces when they are at the most fertile point of their monthly cycle, according to new English research reported by the BBC.

Evolutionary psychologist Dr Edward Morrison of the University of Portsmouth asked women to rate the attractiveness of various facial expressions.

He found that women preferred flirtatious expressions when they were ovulating.

Researchers produced various facial models that were rated on a flirtatiousness scale by one group of 16 women.