Provocative, ground-breaking and entertaining, the world’s leading expert on sexuality and the ovulation cycle reveals the hidden intelligence of hormones.In this paradigm-shifting book, Martie Haselton explains how hormonal intelligence works - both its strengths and its weaknesses - and shows women how to track and understand their desires, fears and perceptions with a radical new understanding of the biological processes that profoundly influence our behaviour. Rigorously researched, entertai