General Medicine General e0f97e89 True about significant variable decelerations is: A Drop in fetal heart rate to less than 90 bpm for 60 seconds B Drop in fetal heart rate to less than 100 bpm for 60 seconds C Drop in fetal heart rate to less than 80 bpm for 60 seconds D Drop in fetal heart rate to less than 70 bpm for 60 seconds