Wired News has an interesting photo essay on interactive birth simulators for students to practice delivery. For example, this baby is part of the Limbs & Things' Prompt Birthing Simulator, consisting of a pelvis-and-thigh device and baby, complete with placenta. From Wired News:
The device simulates various types of delivery, including breech birth, birth on all fours, forceps delivery and the delivery of the placenta.Link
The simulator also allows students to practice extricating babies when their shoulders get stuck during delivery, said (Harvard obstretician Dr. Roxane Nelson). "We can learn how to recognize a situation and use the proper maneuvers."