During exercise, cardiac output and heart rate increase more when a woman is pregnant than when she is not. During labor, cardiac output increases by an normal heart rate in non-pregnant women is between 60 and 100 beats per minute. During pregnancy the heart rate increases an average of 15 beats per normal heart rate in non-pregnant women is between 60 and 100 beats per minute. During pregnancy the heart rate increases an average of 15 beats per ...