Group B had higher gestational age at delivery ( P = 0.001 ) and birth weight ( P = 0.01 ) , but lower cesarean ( OR 3.4 ; 95 % CI , 1.2-10 .3 ; P = 0.03 ) and neonatal care unit admission ( OR 5.4 ; 95 % CI , 1.4-21 .0 ; P = 0.01 ) rates .