Instruct: Classify Amazon reviews into positive or negative sentiment
Query: I had no Idea!

I bought this to see if I can PREVENT pregnancy by tracking my cycle. I had no idea there were more things to consider other than taking your temperature. Not even my OB/GYN clued me in on this during our conversation. When I took a sexual education class in college they didn't cover any of what's in this book. This book is very informative and straight forward. A must read.