The review found no eligible studies for this question.
Summary of findings for selective ß2‐adrenergic agonist probably leads to lower abnormal FHR as defined by trial authors (FHR tracing not improved) compared with no tocolytic agent, whilst awaiting emergency delivery (moderate certainty).
Summary of findings for IV atosiban showed no clear difference in perinatal death or severe morbidity compared with IV hexoprenaline (low certainty).
Summary of findings for IV atosiban showed no clear difference in caesarean delivery compared with IV hexoprenaline (low certainty).
X‐ray pelvimetry may leads to higher caesarean section compared with no X‐ray pelvimetry (low certainty).
It is very uncertain whether X‐ray pelvimetry changes perinatal mortality compared with no X‐ray pelvimetry (very low certainty).
It is very uncertain whether X‐ray pelvimetry changes wound sepsis compared with no X‐ray pelvimetry (very low certainty).
It is very uncertain whether X‐ray pelvimetry changes blood transfusion compared with no X‐ray pelvimetry (very low certainty).
It is very uncertain whether X‐ray pelvimetry changes scar dehiscence compared with no X‐ray pelvimetry (very low certainty).
It is very uncertain whether X‐ray pelvimetry changes admission to special care baby units compared with no X‐ray pelvimetry (very low certainty).
Continuous CTG showed no clear difference in perinatal mortality compared with intermittent auscultation (low certainty).
Continuous CTG probably leads to lower neonatal seizures compared with intermittent auscultation (moderate certainty).
Continuous CTG showed no clear difference in cerebral palsy compared with intermittent auscultation (low certainty).
Continuous CTG may leads to higher caesarean section compared with intermittent auscultation (low certainty).
Continuous CTG may leads to higher instrumental vaginal birth compared with intermittent auscultation (low certainty).
It is very uncertain whether continuous CTG changes cord blood acidosis compared with intermittent auscultation (very low certainty).
Continuous CTG showed no clear difference in any pharmacological analgesia compared with intermittent auscultation (low certainty).
Umbilical artery Doppler ultrasound probably leads to lower any perinatal death after randomisation compared with no Doppler ultrasound (moderate certainty).