Dr. Steven Inglis joins Healthful Woman to discuss ultrasounds in obstetrics. He and Dr. Fox review the advances in ultrasound use due to better technology, embryology, genetics, and training for OB/GYNs, from just “make sure there is a head there” to making diagnoses based on “the difference of a millimeter or two.” They also discuss what OB/GYNs are looking for on an ultrasound and why, and the shortcomings of ultrasound exams.