Characteristics Mean (range)
Maternal age, years 33.19 (20-48)
Nulliparous, % 44.85
Primiparity, % 31.62
BMI prior to pregnancy, kg/m2 24.78 (17.11-36.72)
Gestational age at targeted ultrasound, weeks of gestation 22.98 (16+3-32+0)
Fetal cephalic presentation, % 58.82