Abstract
Evidence suggests that female sexual preferences change across the menstrual cycle. Women's extra-pair copulations tend to occur in their most fertile period, whereas their intra-pair copulations tend to be more evenly spread out across the cycle. This pattern is consistent with women preferentially seeking men who evidence phenotypic markers of genetic benefits just before and during ovulation. This study examined whether women's olfactory preferences for men's scent would tend to favour the scent of more symmetrical men, most notably during the women's fertile period. College women sniffed and rated the attractiveness of the scent of 41 T-shirts worn over a period of two nights by different men. Results indicated that normally cycling (non-pill using) women near the peak fertility of their cycle tended to prefer the scent of shirts worn by symmetrical men. Normally ovulating women at low fertility within their cycle, and women using a contraceptive pill, showed no significant preference for either symmetrical or asymmetrical men's scent. A separate analysis revealed that, within the set of normally cycling women, individual women's preference for symmetry correlated with their probability of conception, given the actuarial value associated with the day of the cycle they reported at the time they smelled the shirts. Potential sexual selection processes and proximate mechanisms accounting for these findings are discussed.
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Selected References
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- Brooksbank B. W., Brown R., Gustafsson J. A. The detection of 5alpha-androst-16-en-3alpha-ol in human male axillary sweat. Experientia. 1974 Aug 15;30(8):864–865. doi: 10.1007/BF01938327. [DOI] [PubMed] [Google Scholar]
- Furlow F. B., Armijo-Prewitt T., Gangestad S. W., Thornhill R. Fluctuating asymmetry and psychometric intelligence. Proc Biol Sci. 1997 Jun 22;264(1383):823–829. doi: 10.1098/rspb.1997.0115. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Gangestad SW, Thornhill R. The analysis of fluctuating asymmetry redux: the robustness of parametric statistics. Anim Behav. 1998 Feb;55(2):497–501. doi: 10.1006/anbe.1997.0610. [DOI] [PubMed] [Google Scholar]
- Gower D. B., Ruparelia B. A. Olfaction in humans with special reference to odorous 16-androstenes: their occurrence, perception and possible social, psychological and sexual impact. J Endocrinol. 1993 May;137(2):167–187. doi: 10.1677/joe.0.1370167. [DOI] [PubMed] [Google Scholar]
- Grafen A. Biological signals as handicaps. J Theor Biol. 1990 Jun 21;144(4):517–546. doi: 10.1016/s0022-5193(05)80088-8. [DOI] [PubMed] [Google Scholar]
- Pause B. M., Sojka B., Krauel K., Fehm-Wolfsdorf G., Ferstl R. Olfactory information processing during the course of the menstrual cycle. Biol Psychol. 1996 Sep 27;44(1):31–54. doi: 10.1016/s0301-0511(96)05207-6. [DOI] [PubMed] [Google Scholar]
- Thomas F, Poulin R. Using randomization techniques to analyse fluctuating asymmetry data. Anim Behav. 1997 Oct;54(4):1027–1029. doi: 10.1006/anbe.1997.0523. [DOI] [PubMed] [Google Scholar]
- Vierling J. S., Rock J. Variations in olfactory sensitivity to exaltolide during the menstrual cycle. J Appl Physiol. 1967 Feb;22(2):311–315. doi: 10.1152/jappl.1967.22.2.311. [DOI] [PubMed] [Google Scholar]
- Wedekind C., Füri S. Body odour preferences in men and women: do they aim for specific MHC combinations or simply heterozygosity? Proc Biol Sci. 1997 Oct 22;264(1387):1471–1479. doi: 10.1098/rspb.1997.0204. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Wedekind C., Seebeck T., Bettens F., Paepke A. J. MHC-dependent mate preferences in humans. Proc Biol Sci. 1995 Jun 22;260(1359):245–249. doi: 10.1098/rspb.1995.0087. [DOI] [PubMed] [Google Scholar]
- Zahavi A. Mate selection-a selection for a handicap. J Theor Biol. 1975 Sep;53(1):205–214. doi: 10.1016/0022-5193(75)90111-3. [DOI] [PubMed] [Google Scholar]