Table 1.

Classification of cardiotocographic patterns according to FIGO-Guidelines

Cardiotocographic classification	Baseline heart frequency	Variability Reactivity	Decelerations
Normal	110–150 beats/min	5–25 beats/min Accelerations	Early decelerations Uncomplicated variable decelerations with a duration of < 60 sec and a beat loss of < 60 beats/min
Intermediary*	100–110 beats/min 150–170 beats/min Short bradycardia episode	> 25 beats/min without accelerations < 5 beats/min for > 40 min	Uncomplicated variable decelerations with a duration of < 60 sec and a beat loss of > 60 beats/min
Abnormal	150–170 beats/min and reduced variability >170 beats/min	< 5 beats/min for > 60 min Sinusoidal pattern	Repeated late decelerations Complicated variable decelerations with a duration of > 60 sec
Preterminal	Total lack of variability and reactivity with or without decelerations or bradycardia

* Combination of several intermediary observations will result in an abnormal CTG.