Chemosensory perception · 2019
Women Have Reduced Ability to Discriminate Body Odors During the Withdrawal Period of Oral Contraception.
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De Lorenzi Cecilia, Rosa Gian Marco, Camellino Dario, Morbelli Silvia, Dorighi Ulrico, Masoero Giovanni, Sambuceti Gianmario, Brunelli Claudio, Cimmino Marco Amedeo
Аннотация
INTRODUCTION: Women's olfactory perception varies across the menstrual cycle. The influence of oral contraceptives on this variability remains unclear.
METHODS: To further estimate this, we assessed discrimination performance for both body odors and ordinary odorants in 36 women, 18 naturally ovulating, and 18 using oral contraceptives. Each participant was tested once a week over the course of a month, and data was then parsed into menstrual phases.
RESULTS: In naturally ovulating women, at the transition from follicular to luteal phases, there was a decline of 19% (p = 0.003) in olfactory discrimination of body odors but not ordinary odorants. In turn, in women using oral contraceptives, only at a later time of the month, at a point corresponding to the late luteal phase and shift from post-ovulation to pre-menstruation, was there a decline of 20% (p = 0.002) in olfactory discrimination performance. Moreover, when we reorganized the data from women using oral contraceptives in order to separately assess the contraceptive withdrawal period (the few days off pills), we observed a 23% reduction (p = 0.01) in discrimination accuracy of body odors but not ordinary odorants during this time alone.
CONCLUSIONS: Women have reduced ability to discriminate body odors during the withdrawal period of oral contraception.
IMPLICATIONS: If women indeed consider men's body odor in their mate selections, then the oral contraception withdrawal period may not be the best time to make such decisions.
METHODS: To further estimate this, we assessed discrimination performance for both body odors and ordinary odorants in 36 women, 18 naturally ovulating, and 18 using oral contraceptives. Each participant was tested once a week over the course of a month, and data was then parsed into menstrual phases.
RESULTS: In naturally ovulating women, at the transition from follicular to luteal phases, there was a decline of 19% (p = 0.003) in olfactory discrimination of body odors but not ordinary odorants. In turn, in women using oral contraceptives, only at a later time of the month, at a point corresponding to the late luteal phase and shift from post-ovulation to pre-menstruation, was there a decline of 20% (p = 0.002) in olfactory discrimination performance. Moreover, when we reorganized the data from women using oral contraceptives in order to separately assess the contraceptive withdrawal period (the few days off pills), we observed a 23% reduction (p = 0.01) in discrimination accuracy of body odors but not ordinary odorants during this time alone.
CONCLUSIONS: Women have reduced ability to discriminate body odors during the withdrawal period of oral contraception.
IMPLICATIONS: If women indeed consider men's body odor in their mate selections, then the oral contraception withdrawal period may not be the best time to make such decisions.