Uzzi Reiss, M.D. knows his subject and explains hormones and how they work in an easy to read manner. Every woman should read this book if she wants to understand her body and how it works - and every man should read this book if he loves his woman and wants to understand that her mood swings can be eliminated, and are nothing to do with him, or how she feels about him.
But, don't go to your NHS doctor and expect him to know/understand. He did not learn this in medical school. And neither did most USA doctors, but you can find a doctor who cares and will help you - they are out there.
I have gifted this book to all the young women in my family and to many friends.