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Obstetric terminology
- 25. Fisher’s scale of CTG (1976) Parameters Points of assessment 0 1 2 1 . Basal rhythm <100 >180 100-120 160-180 120-160 2. Variability (beats/min, quantity) <3 <3 3-6 3-6 6-25 >6 3. Accelerations (per 30 min) 0 1 -4 > 5 4. Decelerations (per 30 min) dip II (late) dip III (variable) dip II dip І (early) dip 0 (spontaneous)