This book is a great resource for the fist timer and the experinced mom-to-be. The weekly format is this book's strong point, it's like a weekly snapshot of what your baby is doing. I used it all through my first pregnancy, and I was amazed at how well the book explained what tests will be done at what time during my pregnancy. The book also gave me basic information about what to expect in labor and delivery. I was able to use information from his book to help me ask clear and poined questions specifically about my pregnancy for my doctor at each visit.Now I am expecting twins, and this book is still my favorite resource. I go every 4 weeks for a sonogram to measure growth. I look at the weighs in the book to compare my babies' growth, and I am always encouraged that the twins are right on target!The wekly format sort of restricts the author's ability to explain other pregnancy related issues such as nutrition, maternity leave, and other things that do not necessilary fall into a specific week. The author sticks these tid-bits in throughout the book. So, for example, if you want to know if it is safe to drink coffee, you'll best find that type of answer by looking in the index. The weekly format by no means prevents you from jumping ahead if there is a specific topic of interest to you.I absolutely do not agree with other reviewers' asessments that this is a very negative book. I think it is a very realistic and honest book. The author is a doctor, and gives you a lot of medical information. While pregnancy is a beautiful miracle, it is not all sunshine and roses. There are miscarrages and other complications. I appreciate knowing about them rather than being caught off guard by them.I do agree that the author's tone is someimes condecending, and some of the dad tips are comical, like telling him to take mom out for dinner, or ask that mom record the heartbeat if he can't make it to a pre-natal appointment. But if you can see your way past that, the book really is a wonderful resource.