Female voices become higher pitched and sexier when most fertile.
In another 'wow, science is incredible' story, New York researchers discovered that a woman's voice sounds the most appealing during her most fertile phase of the month.
The scientists recorded women counting from one to 10 at four different times of the month. When replayed for both men and women, the voices recorded during ovulation were deemed most attractive. The same voices recorded during periods of lowest fertility were found the least appealing.
Add this finding to the list of crazy sensory ways that chemistry attracts us to one another, including the fact that strippers earn the most money during peaks of fertility and that attraction to a man's scent likely indicates a good DNA match-up.