Since its introduction in 1958, ultrasound has improved dramatically and is now the most important non-invasive technique in obstetrics and gynaecology. It is used in many diagnostic and therapeutic procedures. Every medical practitioner needs to have a basic understanding of the subject. This handy, portable manual discusses various important aspects, including basic physics and safety, Doppler ultrasonography, and 3-dimensional ultrasound. It contains new data, clear images and illustrations and will therefore be useful to gynaecologists, residents, ultrasonographers and medical trainees.