Fetal movement: 2 points if three or more discrete body or limb movements within 30 minutes of observation. An episode of active continuous movement is counted as one movement. |
Fetal breathing movements: 2 points if one or more episodes of rhythmic breathing movements of ≥30 seconds within a 30-minute observation period. |
Fetal tone: 2 points if one or more episodes of extension of a fetal extremity or fetal spine with return to flexion, or opening and closing of the fetal hand. |
Amniotic fluid volume: 2 points if a single deepest vertical pocket ≥2 cm is present. The horizontal dimension should be at least 1 cm. |
Nonstress test: 2 points if reactive, defined as at least 2 episodes of FHR accelerations of at least 15 bpm and at least 15 seconds duration from onset to return associated with fetal movement. |
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