Larger deer species have antlers that are "more" than proportionately larger. This is due to allometry, or differential growth rate of body size and antler size during development. This suggests that the antlers of the species' ancestors were already large to begin with. Gould concluded that the large antler size and their position on the skull was very much maintained by sexual selection. Although they were ill-suited for combat between males, they were ideal to intimidate rivals or impress females. Unlike other deer, "M. giganteus" did not even have to turn its head to present the antlers to best effect, but could do this by simply looking straight ahead.