Groups

Definition of groups

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Nulliparous with single cephalic pregnancy, ≥37 weeks gestation in spontaneous labour

Nulliparous with single cephalic pregnancy, ≥37 weeks gestation who either had labour induced or were delivered by CS before labour

Multiparous without a previous uterine scar, with single cephalic pregnancy, ≥37 weeks gestation in spontaneous labour

Multiparous without a previous uterine scar, with single cephalic pregnancy, ≥37 weeks gestation who either had labour induced or were delivered by CS before labour

All multiparous with at least one previous uterine scar, with single cephalic pregnancy, ≥37 weeks gestation

All nulliparous women with a single breech pregnancy

All multiparous women with a single breech pregnancy including women with previous uterine scars

All women with multiple pregnancies including women with previous uterine scars

All women with a single pregnancy with a transverse or oblique lie, including women with previous uterine scars

All women with a single cephalic pregnancy ≥36 weeks gestation, including women with previous scars