Participants
Participants Women underwent randomization at 36 weeks 0 days to 39 weeks 6 days of gestation. Individual women were assigned in a 1:1 ratio according to a computer-generated code with the use of random permuted blocks of randomly varying size generated by the Nottingham Clinical Trials Unit. The randomization was stratified into three categories according to trial center and maternal age (35 to 37 years of age, 38 to 39 years of age, and 40 years of age or older).