What is the Birthplace cohort study? This 2 year English study (April 2008-2010) looked at 64538 low-risk births involving 90% of all midwifery units in England to consider the safety, cost-effectiveness and availability of current maternity services in the 4 available locations: hospital obstetric units (OU), alongside midwifery units (AMU), freestanding midwifery units (FMU) (collectively ...