Evolution and relationship maintenance: Fertility cues lead committed men to devalue relationship alternatives

An evolutionary perspective provides a conceptual framework with which to study adaptive processes that facilitate the maintenance of long-term relationships. One common relationship threat people face involves exposure to tempting relationship alternatives. Desirable relationship alternatives can threaten peopleʹs relationship commitment and, consequently, evoke relationship maintenance processes designed to protect peopleʹs relationship esteem. The current research examined whether cues of female ovulation–an important reproductive variable–evokes relationship maintenance processes in committed men. Men rated the attractiveness of a normally cycling relationship alternative at various points in her menstrual cycle. Unlike single men, who rated the woman as especially attractive when she was highly fertile, committed men exhibited the opposite pattern, rating her as less attractive during her period of peak fertility. This research illustrates the utility of integrating theories of relationship maintenance with evolutionary psychological theories of mating.