I would recommend this to any woman who wants to learn about their bodies. This book has material that all girls SHOULD have learned in those health classes, but didn't. A great reference. This book describes a woman's cycle and how to determine both things like your fertile time AND possible health issues: for example, by charting your temperature, you can tell not only when you're ovulating but IF you're ovulating (very necessary for conception, obviously!) and things such as thyroid issues, miscarriage etc. She provides a lot of examples and sample charts to make it easy to follow.