Planned caesarean section versus planned vaginal birth for breech presentation at term was studied in a randomized multicentre trial. The study found that for women with a breech baby close to their due date, a planned c-section is safer than planned vaginal delivery and results in fewer serious complications for the baby. The trial was conducted across 121 medical centers and involved over 3,000 women with breech babies at term to compare outcomes of planned c-section versus planned vaginal delivery.