35 weeks of fetal heart monitoring failed, need to be discussed separately according to the specific circumstances, if other pregnancy test data is more satisfactory, only 35 weeks of fetal heart monitoring failed, may be related to the fetus is in a sleep state, is a common phenomenon of fetal monitoring, do not need to worry. If many times failed, need to further according to the reasons for targeted treatment. 1, physiological factors: fetal sleep cycle is about 20-40 minutes, if the examination of the fetus is in the sleep period, the fetal heart rate monitoring curve shows baseline variation, obviously reduced state. At this time, the pregnant woman can eat a small amount of food, or appropriate increase in exercise, such as walking, climbing stairs and listening to music, can stimulate the fetus to produce movement, and so the fetus is active after the fetal heart monitoring can be carried out again in order to determine; 2, drug factors: such as pregnant women due to disease taking sedative-hypnotic drugs, antispasmodic drugs, such as magnesium sulfate, may inhibit the fetal heart rate, the manifestation of the fetus does not respond well, resulting in fetal heart rate monitoring abnormality. Should actively communicate with the doctor, follow the doctor’s instructions for the rational use of drugs, or change the drugs continue to fetal heart monitoring, observation of fetal condition; 3, pathological factors: if the umbilical cord around the neck, maternal blood oxygen content is insufficient to cause hypoxia, resulting in intrauterine distress, showing frequent fetal heart deceleration, and through the continuous induction of the fetal heart is always active, the need for timely oxygen and change the position to relieve the symptoms of fetal hypoxia and then again for Fetal cardiac monitoring is necessary to terminate the pregnancy if the fetus is suffering from intrauterine hypoxia. Fetal heart rate monitoring is the main test for assessing the condition of the fetus in the uterus. If fetal heart rate monitoring is substandard, it needs to be repeated to ensure normal fetal development.