Dr. Mary Claire Haver addresses readers directly, explaining she wrote the book with her two daughters (now in their early twenties) in mind, hoping to empower them with knowledge about perimenopause. She argues that women deserve better healthcare than previous generations received—care marked by vague answers and dismissed symptoms. The book represents both her medical expertise and her personal empathy, functioning as a love letter to her younger self who lacked this information before her own perimenopause.

Haver emphasizes that every woman’s perimenopause journey is unique and valid. She critiques the historical approach to women’s health, where women were treated as “smaller, more emotional versions of men” (xii), leading to significant knowledge gaps and chronic underfunding. At 57, she describes herself as healthier and happier than ever, with stronger boundaries and more fulfilling relationships.

She calls for collective action to rewrite the narrative around women’s health, demanding better research and comprehensive care. The book is divided into four parts: historical and clinical context; hormonal vulnerabilities; reproductive changes; and guidance on hormone therapy, supportive health habits, and navigating healthcare appointments.