This issue of Ultrasound Clinics addresses obstetric applications. Articles include U/S for Cervical length; Fetal ventriculomegaly; C/S scar ectopics; Skeletal dysplasias; Effects of obesity on obstetrical u/s imaging; Fetal lung; Abdominal wall defects; Fetal hydronephrosis; U/S for evaluation of fetal anemia; Training for Ultrasound Guided Procedures.