Men’s Testosterone Responds to the Aroma of Ovulation
Women around the world spend billions of dollars each year on exotic smelling perfumes and lotions in the hopes of attracting a mate.
However, according to a new study in Psychological Science, going “au naturale” may be the best way to capture a potential mate’s attention.
Smells are known to be critical to animal mating habits:
Animal studies have shown that male sexual testosterone levels are influenced by odour signals emitted by females, particularly when they are ovulating (that is, when they are the most fertile).
Psychological scientists Saul L. Miller and Jon K. Maner wanted to see if a similar response occurs in humans.
In two studies, women wore tee shirts for 3 nights during various phases of their menstrual cycles. Male volunteers smelled one of the tee shirts that had been worn by a female participant. In addition, some of the male volunteers smelled control tee shirts that had not been worn by anyone. Saliva samples for testosterone analysis were collected before and after the men smelled the shirts.
Results revealed that;
- men had more testosterone after smelling the tee shirts of ovulating women than men who smelled tee shirts worn by non-ovulating women or men who smelled the unworn tee shirts.
- In addition, men rated the shirts worn by ovulating women as the most pleasant smelling.
The authors note that “the present research is the first to provide direct evidence that sense of smell cues to female ovulation influence biological responses in men.”
In other words, this study suggests that testosterone levels may be responsive to smells indicating when a woman is fertile.
The authors conclude that this biological response may promote mating-related behavior by males.
From a press release of the Association for Psychological Science, Jan 13th 2010.