The heart rate of pregnant women may increase after late pregnancy, with an increase of 10-15 beats/min compared to the previous heart rate and normal heart rate, and most pregnant women maintain a heart rate between 60-100 beats/min. Most pregnant women have a heart rate of 60-100 beats. In the later stage, the heart rate may increase due to changes in hormone levels, personal mood swings and increased cardiac load, etc. In this case, pregnant women do not need to be overly nervous and pay attention to relaxing emotionally. At the same time, it is important to have regular heart checkups, such as cardiac ultrasound and electrocardiogram, to exclude pathological factors. Pregnant women should stay emotionally relaxed in daily life, increase the exercise load appropriately, and maintain normal physical activity.