Women looking for that special someone might want to think twice before spritzing Chanel No. 5. A new study suggests that a woman's natural scent may be all she needs.

Recent research shows that a man's testosterone levels, which are linked with sexual interest, are significantly higher when they smell the shirt of a woman who is ovulating. These findings could lead to the development of new fragrances that mimic this effect, and answer basic questions about human biology...