36 weeks pregnant fetal heart 170 ~ 180 times / min is not necessarily dangerous, need to be analyzed in conjunction with the specific circumstances.
1. Fetal heart is normal at 110 to 160 beats / min, if the fetal heart lasts more than 10 minutes are & lt; 110 beats / min or & gt; 160 beats / min is considered that the fetus may have intrauterine distress.
2. Abnormal fetal heart rate is not necessarily dangerous, because the fetal heart will also be affected by the mother-to-be, such as drinking strong tea or coffee, fever, anger, insomnia, hyperthyroidism, can also cause the fetal heart rate.
If abnormal fetal heart rate is detected during the checkup, it is recommended to visit the obstetrics clinic in time to complete the relevant examinations, to rule out intrauterine hypoxia, and to terminate the pregnancy if necessary.