Table 3 Intrapartum interventions

• Dublin intrapartum fetal heart rate monitoring [16,17,18,19]

• Vacuum extraction vs forceps (Portsmouth operative delivery) [20,21,22]

• Vacuum extraction: different cups [23]

• Fetal scalp electrode [24]

• Perineal management (Berkshire) [25, 26]

• Perineal suture (Southmead) [27]

• Catgut for the repair of perineal trauma [28, 29]

• Ipswich perineal repair [30,31,32,33]