PARAMETER ABNORMAL SIGN EVALUATION SCORE
BASELINE FHR 110-130 or 160-180 1
  bpm <110 or>180 bpm 3
DECELERATION    
Duration > 60 sec 3
Amplitude > 50 bpm 2
Dip heart rate < 100 bpm 2
Recovery time > 40 sec 3
Lag time > 40 sec 3
  No accompanied acceleration 2
  W-shaped deceleration 4
FHR SCORE = of evaluation scores in 5 min
Table 1: Caluation of FHR score.