Teamwork training is increasingly being used to improve communication, interprofessional collaboration, and situational awareness in crisis situations. Training may take place "in the field" or in simulated patient care scenarios, and has been widely implemented in environments ranging from the emergency department to children's hospitals. This systematic review sought to determine the effects of multidisciplinary teamwork training on obstetric teams' ability to navigate simulated crisis scenarios, and found that teamwork knowledge and skills generally improved. However, only one study actually assessed the effect of the training on participants' subsequent clinical outcomes. Concerns raised by this review mirror those of a recent systematic review of teamwork training programs, namely a lack of high-quality studies and significant variation in the type and intensity of the programs themselves.