This book "Color Doppler in Obstetrics and Gynecology: Text and Atlas" is specifically designed for obstetricians and gynecologists, who are practicing ultrasound also. In fact, ultrasound is an inevitable modality for obstetricians and gynecologists and Doppler is a valuable addition to it, for obstetric, gynec and infertility. But it has been observed that this technology is not fully exploited because of inadequate know-how of the subject. A simple explanation and presentation of Doppler technology and findings therefore can be of great help to the obstetricians and gynecologists to use Doppler at its best and arrive to correct diagnosis. And all efforts have been made therefore to include all the common pathologies of obstetrics and gynecology in this book, for the diagnosis of which Doppler can make a difference.