Fig. 3From: Are freestanding midwifery units a safe alternative to obstetric units for low-risk, primiparous childbirth? An analysis of effect differences by parity in a matched cohort studyReasons for transfer during labour or <2Â h postpartum: primiparas. *Defined as no progress for >2Â h in 1st stage or active pushing for >2Â h in 2nd stage. **Defined as painful contractions >24Â h and cervical dilation <3Â cmBack to article page