At 12 weeks pregnant, a fetal heart rate of 172 beats/minute should be a normal occurrence.
In general, in the middle and late stages of pregnancy, a woman’s fetal heart rate should be between 110 and 160 beats per minute, which refers to the quiet state. If the fetus is active or the uterus is contracting, the fetal heart rate will increase slightly.
In the early stages of pregnancy, when the fetus is small, the fetal heart rate may be relatively faster and may be above 160 beats per minute. If all other tests are normal and the fetal heart rate is 172 beats per minute at 12 weeks of pregnancy, this should be a normal phenomenon and should not indicate that the fetus is lacking oxygen.
If the fetal heart rate is 172 beats per minute when the fetus is quiet in the middle and late stages of pregnancy, this situation is not normal, and it is likely that the fetus is hypoxic, and it needs to be treated with oxygen in time.