If the fetus is not active in the uterine cavity at the time of fetal heart monitoring, the fetus may have been in a sleep state. abdomen: you can wake up the fetus through the sense of vibration and gently patting; 4.appropriate oxygen intake: stimulate the fetus by increasing the oxygen supply to the fetus. When doing fetal heart monitoring, it is better to choose to check when there are more fetal movements. The results of fetal heart monitoring need to be professionally interpreted by obstetricians to avoid abnormal results from going undetected and affecting the safety of the fetus and the pregnant woman.