Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A lifesaver!!!

This is the most valuable prenatal information I've ever found. Thanks to this book, my doctor and I were able to determine the most suitable exercises for me at my age of 42 and carrying a very high risk pregnancy. I was ordered on bedrest at 19 weeks, but was able to do many exercises from the high risk chapter. Thanks to Birgitta's incredible knowledge and expertise on High risk pregnancy exercise, I was able to make it to 38 weeks. And my doctor wasn't sure I'd make it through 30 weeks...but we are certain that the strength I was able to maintain by these very modified exercises may have saved my 7lbs. 4oz, baby girls life. Or at least her health. My OB is now ordering all of her pregnant patients to exercise for healthier outcomes. A MUST READ FOR ANY PREGNANT WOMAN. helen.