The reasons for the failure of fetal heart rate monitoring include: low placental reserve function, fetal sleep, intrauterine hypoxia, maternal factors and so on.
1. Low placental reserve function: fetal heart rate monitoring can reflect the placental reserve function. If the placental reserve function is low, there will be a small change in the baseline of fetal heart rate and an abnormal increase in the fetal heart rate during fetal movement during fetal heart rate monitoring, which will lead to the failure of fetal heart rate monitoring.
2. Fetus is in sleeping state: in the process of fetal heart rate monitoring, if the fetus is in sleeping state, it will lead to the abnormal situation such as the decrease of fetal movement, which will lead to the failure of fetal heart rate monitoring.
3. Fetal intrauterine hypoxia: if the fetus is hypoxic due to factors such as umbilical cord around the neck, severe calcification of the placenta and other factors, it will result in abnormal fetal heart rate, late deceleration of the fetal heart and other conditions, leading to unqualified fetal heart rate monitoring.
4. Maternal factors: the mother suffers from diseases, such as fever, heart disease, etc., or the mother is in a state of hunger, agitation, fetal heart rate monitoring will occur when the fetal heart rate is too fast or too slow and other abnormalities, resulting in failure of the test.
Failure of fetal heart rate monitoring, we must actively cooperate with the doctor to find out the reasons, clarify the situation, and carry out targeted treatment, in order to ensure the health of the mother and baby.