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There are several lines of evidence that suggest that men might, in fact, be able to detect when women ovulate (Symons, 1995). First, during ovulation, women’s skin becomes suffused with blood. This corresponds to the “glow” that women sometimes appear to have, a healthy reddening of the cheeks. Second, women’s skin lightens slightly during ovulation as compared with other times of the menstrual cycle—a cue universally thought to be a sexual attractant (Frost, 2011; van den Berghe & Frost, 1986). A cross-cultural survey found that “of the 51 societies for which any mention of native skin preferences… is made, 47 state a preference for the lighter end of the locally represented spectrum, although not necessarily for the lightest possible skin color” (van den Berghe & Frost, 1986, p. 92). Third, during ovulation, women’s level of circulating estrogen increases, which produces a corresponding decrease in women’s WHR (Symons, 1995, p. 93). Fourth, ovulating women are touched more often by men in singles bars (Grammer, 1996). Fifth, men find the body odor of women to be more attractive and pleasant smelling during the follicular (fertile) stage of the menstrual cycle (Gildersleeve, Haselton, Larson, & Pillsworth, 2012; Havlicek, Dvorakova, Bartos, & Flegr, 2005; Singh & Bronstad, 2001). Sixth, men who smell T-shirts worn by ovulating women display a subsequent rise in testosterone levels compared to men who smell shirts worn by non-ovulating women or shirts with a control scent (Miller & Maner, 2010), although a subsequent study failed to replicate this effect (Roney & Simmons, 2012). Seventh, there are vocal cues to ovulation—women’s voices rise in pitch, in the attractive feminine direction, at ovulation (Bryant & Haselton, 2009). Eighth, women’s faces are judged by both sexes to be more attractive during the fertile than during the luteal phase (Puts et al., 2013; Roberts et al., 2004). Ninth, men perceive their romantic partners to be more attractive around ovulation (Cobey, Buunk, Pollet, Klipping, & Roberts, 2013). Tenth, women report feeling more attractive and desirable, as well as an increased interest in sex, around the time of ovulation (R ö der, Brewer, & Fink, 2009). And 11th, a study of professional lap dancers working in gentlemen’s clubs found that ovulating women received significantly higher tips than women in the non-ovulation phases of their cycle (Miller, Tybur, & Jordan, 2007).
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David M. Buss (Evolutionary Psychology: The New Science of the Mind)