Fertile women raiset their voice pitch
Women's voices rise and fall in tune with their fertility, according to research by psychologists. Recordings of women taken at different times in their monthly cycle show that the female voice rises perceptibly a day or two before ovulation, when women are most likely to become pregnant. The findings are the first to point to a link between voice and fertility and build on recent studies which support the idea that humans may be similar to other animals in displaying outward signs of fertility. So you guys, sense the tone!