The Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology (ISUOG), Ultrasound in Obstetrics & Gynecology (UOG) is an international, peer-reviewed journal. Published monthly, the journal includes original papers, case reports, reviews, Editorial and Opinion articles, and a letters column. UOG is covered by all the primary indexes including Index Medicus and Current Contents, and is read by Obstetricians, Gynecologists, Radiologists, Pediatricians, Sonographers, Midwives and Radiographers.