During labor, electronic fetal monitors measure both fetal heart rate (FHR) in beats per minute (bpm) and the strength of uterine contractions in millimeters of mercury (mmHg). The two measures are tracked simultaneously during labor. The duration of a uterine contraction is measured from the onset of a sharp increase in uterine pressure from a baseline (typically 0 mmHg as shown) to the return to the baseline.

Fill each blank using the drop-down menu to create the most accurate statement on the basis of the information provided.

1. In the given graph, the difference between the fastest fetal heart rate (in beats per minute) and the slowest is approximately____________beats per minute.

A. 0
B. 20
C. 35
D. 50

2. The uterine contraction lasts approximately____________seconds.

A. 40
B. 50
C. 60
D. 70




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