Gynaecology & Obstetrics In normal NST, the time period for two or three accelerations that peak at 15 bpm or more above baseline is: A 3 B 15 C 20 D 60 💡 Explanation In normal NST, the time period for two or three accelerations that peak at 15 bpm or more above baseline is: ✓ Correct Answer: C. 20