Using the Ovulatory Shift Hypothesis framework, this study investigated if hormonal fluctuations affected mate guarding behaviors, jealousy, and relationship satisfaction in long-term couples. Committed, heterosexual couples ( N = 98, n = 49 pairs) completed daily surveys tracking relationship dynamics for one menstrual cycle (e.g., 28 days; all naturally cycling). Analysis showed partners’ relationship satisfaction, jealousy, and mate guarding behaviors were positively correlated. Results also showed men’s relationship satisfaction was correlated with their partner’s mate guarding behaviors when she menstruated. Dependent t-tests showed mate guarding behaviors increased during menses compared to the fertile phase. Finally, regression analysis, showed that jealousy and mate guarding behaviors predicted relationships when the female partner menstruated. When the female partner was in her fertile phase, only mate guarding behaviors positively predicted relationship satisfaction. Findings demonstrate the ovulatory shift hypothesis may not be applicable in established couples who may be making the conscious decision to remain committed to their romantic partner. In couples where mate guarding and jealousy are low; counselors should reframe these behaviors as a demonstration of relationship investment.
Meyer et al. (Tue,) studied this question.