Siren voice means she's fertile
October 8th, 2008 in Biology /
A woman is seen in silhouette. 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 published Wednesday in the British journal Biology Letters.
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 published Wednesday in the British journal Biology Letters.
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