Support for LMC influencing sex ratio was found by examining the sex ratios of different fig wasps. Species with wingless males that can only mate with sisters were predicted to have higher rates of female-biased sex ratios, while species with winged males that can travel to other figs to fertilize non-related females were predicted to have less biased sex ratios. Consistent with LMC influencing sex ratio, these predictions were found to be true. In the latter case, LMC is reduced, and investment in male offspring is less likely to be “wasted” from the mother's point of view.