Changes in Women's Facial Skin Color over the Ovulatory Cycle are Not Detectable by the Human Visual System.

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Burriss, Robert P 
Troscianko, Jolyon 
Lovell, P George 
Fulford, Anthony JC 
Stevens, Martin 

Human ovulation is not advertised, as it is in several primate species, by conspicuous sexual swellings. However, there is increasing evidence that the attractiveness of women's body odor, voice, and facial appearance peak during the fertile phase of their ovulatory cycle. Cycle effects on facial attractiveness may be underpinned by changes in facial skin color, but it is not clear if skin color varies cyclically in humans or if any changes are detectable. To test these questions we photographed women daily for at least one cycle. Changes in facial skin redness and luminance were then quantified by mapping the digital images to human long, medium, and shortwave visual receptors. We find cyclic variation in skin redness, but not luminance. Redness decreases rapidly after menstrual onset, increases in the days before ovulation, and remains high through the luteal phase. However, we also show that this variation is unlikely to be detectable by the human visual system. We conclude that changes in skin color are not responsible for the effects of the ovulatory cycle on women's attractiveness.

Adolescent, Adult, Beauty, Color, Face, Female, Fertility, Humans, Luteal Phase, Ovulation, Pattern Recognition, Visual, Photography, Sexual Behavior, Voice
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PLoS One
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Public Library of Science (PLoS)
Biotechnology and Biological Sciences Research Council (BB/G022887/1)
RPB is supported by an Anniversary Research Fellowship at Northumbria University. MS and JT were supported by a David Philips Research Fellowship awarded to MS by the Biological Sciences Research Council (BBSRC) (BB/G022887/1). HMR was supported by a Junior Research Fellowship at Churchill College, University of Cambridge, and is supported by an Institute Research Fellowship at the Institute of Zoology.