Final answer:
The recommended characteristic for a reassuring or normal fetal heart rate (FHR) tracing is early decelerations.
Step-by-step explanation:
The characteristic recommended by fetal monitoring experts for a reassuring or normal fetal heart rate (FHR) tracing is Early decelerations. Early decelerations refer to a gradual and symmetrical decrease in the fetal heart rate during a contraction, which then returns to the baseline when the contraction ends. They are considered to be a normal and reassuring finding during labor and delivery.