The majority of American women have used a hormonal contraceptive. According to a recent study, women taking hormonal contraceptives, and their male partners, display more “mate retention” tactics (i.e., doing things to keep their partners from straying, such as looking especially sexy or showcasing resources) compared to women, and male partners of women, who do not take hormonal contraceptives. Analyses revealed that it was the synthetic estradiol rather than progesterone that likely causes these effects.
Welling, L. L. M., Puts, D. A., Roberts, S. C., Little, A. C., & Buriss, R. P. (2012). Hormonal contraceptive use and mate retention behavior in women and their male partners. Hormones and Behavior, 61, 114-120.