Methods	Randomised controlled trial.
Participants	476 women with high-risk singleton pregnancies referred for fetal assessment
Interventions	Study group had Doppler ultrasound and control group was managed without Doppler ultrasound
Outcomes	Induction of labour, elective and emergency caesarean section, preterm delivery, perinatal death
Notes	Published in abstract form only.
Risk of bias
Bias	Authors’ judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Patients were randomly assigned.
Allocation concealment (selection bias)	Unclear risk	Not described.
Blinding of participants and personnel (performance bias) All outcomes	High risk	Not blinded.
Blinding of outcome assessment (detection bias) All outcomes	High risk	Not blinded.
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Unclear - limited data as only abstract form available.
Selective reporting (reporting bias)	Unclear risk	Unclear - limited data as only abstract form available.
Other bias	Unclear risk	Unclear - limited data as only abstract form available.