1. A computer-implemented method for analyzing a fetal ultrasound image, the computer including a processor and a memory operatively coupled to the processor, the method comprising: accessing, in the memory, a first statistical model calculated from training data representing shapes of conforming fetal abdominal tissue exemplars; accessing, in the memory, image data representing a scan plane in an ultrasound image; identifying, by the processor, a region of interest including an abdomen in the scan plane using the first statistical model; accessing, in the memory, a second statistical model calculated from training data representing shapes of conforming fetal anatomical structure exemplars; determining, by the processor, whether one or more anatomical structures are present within the region of interest using the second statistical model; and assigning, by the processor, a rating to the scan plane based on the presence of the one or more anatomical structures in the region of interest.