Skip to main content

Table 2 The definition of three categories of fetal status (normal, suspicious and pathology) according to the FIGO guidelines

From: Investigating the interpretability of fetal status assessment using antepartum cardiotocographic records






Between 110 and 150 bpm

Between 100 and 110 bpm or between 150 and 170 bpm

Below 100 or above 170 bpm


Between 5 and 25 bpm

Amplitude of variability between 5 and 10 bpm for more than 40 s

Persistence of heart rate variability of less than 5 bpm for more than 40 s



Increased variability above 25 bpm; Variable decelerations

Severe variable decelerations or severe repetitive early decelerations; Prolonged decelerations; Late decelerations: the most ominous trace is a steady baseline without baseline variability and with small decelerations after each contraction; A sinusoidal pattern