The fetal heart rate of 110-160 beats per minute at 12 weeks is relatively normal, in early pregnancy the fetal heart rate is faster and can reach 160-170 beats per minute, this is normal, do not worry too much. If the fetal heart rate is too fast or too slow, it is not normal. There are many factors that affect the fetal heart rate, which may be caused by maternal factors or fetal factors. It is recommended that you pay more attention to your health during pregnancy, and pay more attention to rest, it is best not to overexert yourself. If there are any problems such as bleeding in the pubic area, abdominal pain or changes in the fetal heart rate, it is recommended to seek medical attention and do the relevant fetal preservation work.