Heightpill:
"Pawlowski and Jasienska (2005) showed women images of male and female couples that varied in their differences in height, with some of them depicting couples of nearly equal height, and others depicting couples with great disparity in height, with either the man or the woman being taller. The researchers found that women in the fertile phase of the cycle, more so than women in other cycle phases, preferred images in which the difference between the men and women was greater, with the man being taller than the woman. As with behavioral and vocal dominance, this effect was strongest when women evaluated the men as short-term mates."