Male chemistry primes females for reproduction -- but at a cost

A research team led by a Northwestern University scientist has discovered that male animals, through their invisible chemical 'essence,' prime female animals for reproduction but with the unfortunate side effect of also hastening females' aging process. The females sense the two signals and respond by altering their physiology. These findings in roundworms, which echo those made in mammalian studies, could lead to therapies that delay puberty and prolong fertility in humans as well as combat aging.

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