I started following this book in the middle of the day. The first night my 10 week old went from getting up 2-3 times a night to just once, the second night she slept though the night. Its been 5-6 weeks and she is doing great, she only woke up at night about 2-3 times since we started. This book changed my life. I went from having severe postpartum depression to a much happier Mom in just a few days after starting, I only wish I started sooner.