Identifies the sources of behavioral and physiological changes attributed to a woman's hormone cycles, revealing a hidden adaptive intelligence in the body's hormones and how an awareness of protective hormonal activity can help women to make better-informed decisions.

Introduction: The new Darwinian feminism -- The trouble with hormones -- Heat seekers -- Around the Moon in twenty-eight days -- The evolution of desire -- Mate shopping -- The (not quite) undercover ovulator -- Maidens to matriarchs -- Hormonal intelligence.