Its amazing what people get money to investigate.
And the study is not really large enough to be of much import either.
This in the Herald
A woman raises the pitch of her voice during her most fertile period of the month in an unconscious boost to her femininity, according to a study in the British journal Biology Letters.
A pair of scientists at the University of California in Los Angeles asked 69 women to make voice recordings when they were at high and low fertility points in their menstrual cycle.
The closer a woman was to ovulation, the more she raised her pitch, the investigators found.
The increase in tone was slight, but enough to be picked up by the voice decoder and presumably by the male ear as well.
How differential gears work
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