Fetal head position during the second stage of labor: Comparison of digital vaginal examination and transabdominal ultrasonographic examination

In 20% of the cases, ultrasonographic and clinical results differed significantly (i.e., >45°). This rate reached 50% for occiput posterior and transverse locations. Transabdominal ultrasonography is a simple, quick and efficient way of increasing the accuracy of the assessment of fetal head position during the second stage of labor.