Whether it is dangerous for a pregnant woman to have a heartbeat of 100 beats per minute or more depends on the specific value and clinical presentation. If a pregnant woman does not experience palpitations or other discomfort, there is generally no great danger. If the heartbeat is faster and is accompanied by palpitations, panic attacks, chest tightness and other discomforts, you need to consult a cardiologist for relevant tests to avoid affecting your health and the health of your fetus. The normal adult heartbeat is 60-100 beats per minute, but due to the increase in blood volume after pregnancy, the heart beat volume increases accordingly, and the heart burden increases, the heartbeat will speed up accordingly, usually by 10-15 beats per minute, which is a normal phenomenon brought about by the physiological changes of pregnant women. In addition, if a pregnant woman walks too fast, moves too fast, or feels fatigue or lack of oxygen, she may have difficulty in breathing, resulting in a faster heartbeat. If the blood pressure of the pregnant woman is within the normal range and the heart rate exceeds 100 beats per minute and is at its borderline value, without other uncomfortable symptoms, she can rest in bed and be observed. If the situation is serious and exceeds 120 beats per minute, you need to go to the hospital promptly and be treated under the guidance of a cardiologist.