Table 2.

NICE classification of fetal heart rate trace features

Features	Baseline FHR	Variability	Deceleration	Acceleration
Reassuring	110–160	More than 5	None	Present
Non-reassuring	100–109 or 161–180	Less than 5 for 40- 90 min	Typical variable deceleration with over 50% of contraction, occurring for over 90 min. Single prolonged deceleration for up to 3 m	The absence of acceleration with otherwise normal trace is of uncertain significance
Abnormal	< 100  > 180	Less than 5 for 90 min	Either atypical variable decelerations with over 50% of contractions or late decelerations, both for over 30 min. Single prolonged deceleration for more than 3 min	The absence of acceleration with otherwise normal trace is of uncertain significance