Fig. 1

Selection of study population from available records and definition of the study groups. *Ineligible for ECV for any of the following reasons (number excluded; % of total ineligible): oligohydramnios (580; 8.0%), previous CS (5273; 73.1%), pelvic abnormality (352; 4.9%), placenta praevia (483; 6.7%), placenta accreta (124; 1.7%), antepartum haemorrhage or abruption (651; 9.0%), infant has major congenital anomaly (466; 6.5%)