While women often experience headaches, pain, and shifts in mood around their time of the month (premenstrual syndrome;Dickerson et al., 2003), less is known about the social consequences of women's menstrual cycles. In the past two decades, psychologists have studied the human ovulatory cycle at length, attempting to pinpoint its significance in human mate selection. Human ovulatory cues, once thought to be "concealed," have recently been detected through women's behavior, scent, voice, and physical appearance (Haselton & Gildersleeve, 2011). Women's subtle ovulatory cues may serve an important evolutionary purpose, signaling fertility to desirable partners without attracting unwanted sexual advances . Thus, ovulating women may have a greater ability to reproduce with high-quality men. Alternatively, the "leaky cues hypothesis" (Haselton & Gildersleeve, 2016) posits that ovulatory cues are not evolutionarily adaptive, but instead result as a by-product of hormonal shifts. It is further suggested that evolutionary pressures may have in fact led to the greater concealment of ovulatory cues that sets human estrus apart from that of other mammals.Despite the relatively hidden nature of human estrus, near ovulation, women have been found to smell (Gildersleeve et al., 2012), look (Oberzaucher et al., 2012 and sound more attractive (Karthikeyan & Locke, 2015;Pipitone & Gallup, 2008). Women have also been found to be more receptive to men's advances near ovulation, agreeing to dance with unknown male confederates (Guéguen, 2009a) and giving their phone numbers out to them (Guéguen, 2009b) at higher rates. Their sexual interest is seemingly accompanied by greater efforts to enhance their own beauty (Haselton et al., 2007). A recent preregistered 40-day diary study of 421 heterosexual normally cycling women (143 with valid data) confirmed that near conception, women show a greater desire for both their partners and for men aside from their partners, along with greater assessments of their own desirability (Arslan et al., 2018). However, contrary to expectations, these same women did not dress differently or behave differently with regard to mate retention techniques.Taken together, ovulatory cues appear to have a tangible effect on men's sexual interest. Men have been found to rate their female partners as more attractive when they are ovulating (Cobey et al., 2013). Accordingly, men are more possessive when their female partners are more fertile (Gangestad et al., 2002), even showing greater increases in testosterone in response to romantic rivals (Fales et al., 2014). Men have also been found to experience increases in testosterone and sexual interest after being exposed to the scent of fertile