This book demonstrates the importance of Ultrasound technologies in gynecological and perinatal practice through a selection of interesting reports.•The book is divided into two sections. The first, the gynecological section, concerns the importance of ultrasound in diagnosing rare uterine anomalies and differentiating benign from malignant tumors of the uterus and ovaries. •The second part refers to pathological conditions in pregnancy and the use of ultrasound not only in diagnosing fetal pathology but also in managing conditions with potentially adverse outcomes.•Chapters are written in simple language and enriched with ultrasound images of selected cases recorded in the authors’ daily practice.