My husband and I haven't starting trying to conceive yet, but what an awesome resource when we do! We'd love to swing the odds a bit (although we'd be thrilled with a healthy baby of either gender) and this is a well-written explanation of the biology behind the practice of choosing your baby's gender. I have a science background, and I greatly appreciate research-based data and Dr. Shettles' book provides just that. Its not anecdotal, its not superstition or voodoo, its real research. This book, combined with Toni Weschler's Taking Charge of Your Fertility (amazing book in its own right) gave me everything I ever wanted to know about my own body and cycles, and therefore potentially choose the gender of our baby. I highly recommend it!