When is continuous electronic fetal monitoring (CTG) indicated instead of intermittent auscultation?

Continuous CTG is indicated for high-risk pregnancies/labours or when an abnormality is suspected on intermittent auscultation.

Indications include: meconium-stained liquor, antepartum/intrapartum bleeding, oxytocin augmentation, maternal pyrexia/sepsis, hypertension/pre-eclampsia, fetal growth restriction, abnormal auscultation, prematurity, multiple pregnancy, and previous caesarean (VBAC).

Clinical relevance. Knowing the CTG indications ensures continuous monitoring is used where it adds value, not routinely in low-risk labour.

More Detail

Indications for continuous CTG

Continuous monitoring is reserved for situations with a higher risk of fetal compromise.

General principle

• High-risk pregnancies/labours, or any time an abnormality is suspected on intermittent auscultation.

Specific indications

• Significant meconium-stained liquor.
• Antepartum or intrapartum haemorrhage.
• Oxytocin augmentation/induction.
• Maternal pyrexia/sepsis (suspected chorioamnionitis).
• Hypertension/pre-eclampsia.
• Fetal growth restriction / abnormal Dopplers.
• Abnormal fetal heart rate on auscultation.
• Prematurity, multiple pregnancy, breech, previous caesarean (VBAC).

Caveat

• Continuous CTG has a high false-positive rate and is associated with increased intervention (caesarean/instrumental delivery) without proven reduction in cerebral palsy - so it is reserved for higher-risk situations, not routine low-risk labour.