From: Intramuscular oxytocin versus oxytocin/ergometrine versus carbetocin for prevention of primary postpartum haemorrhage after vaginal birth: study protocol for a randomised controlled trial (the IMox study)
Pooled prevalence:
need for subsequent additional uterotonic drugs
Percentage not requiring additional uterotonic drugs
Oxytocin
19.1%
80.9
Oxytocin/ergometrine
15.2%
84.8
Carbetocin
11.5%
88.5%