Do fetal monitoring tool is fetal monitor, it is a kind of can be formed by the principle of ultrasonic Doppler fetal heartbeat and current change. Fetal monitor is used for detection of fetal heart rate and uterine tracings of a measuring instrument, and it can also reflect the fetal heart activity pattern, is one of the most common way to monitor intrauterine status of pregnant women.

The changes of the fetal heart is the normal development of the fetal central nervous performance, can be very intuitive to show the fetus reserve capacity and health. The change of electronic fetal heart monitor can continuously detect fetal heart rate and uterine pressure, fetal heart and can provide real-time information between the labor force, compared to artificial auscultation, it will not be affected by the influence of uterine contraction, can see the moment of the fetal heart rate.

The doctor can from the fetal heart and not the same as the baseline monitoring patterns, to obtain timely and accurate information, it can not only evaluate the real-time situation of the fetus, to provide the basis for the treatment of dystocia, can detect fetal reserve function and whether it will have severe symptoms such as umbilical cord winding. So do vaginal delivery for fetal monitoring tolerance has a certain value in predicting. So the electronic fetal heart rate monitoring with a quick, convenient, clear, accurate, easier for women, is one of the important measures to improve the quality of Obstetrics, is pregnant women try and application.

In the production process, each period appeared abnormal signal of CTG can be used as fetal hypoxia. But CTG itself has twenty-five percent to fifty percent false positive rate, and status of fetal placental function may be affected. At present, obstetric doctors are looking for a new detection method and CTG application, so as to monitor the actual situation of the fetus.

The most common are fetal scalp pH value determination, amniotic fluid monitoring, biophysical score, arterial blood flow velocity measurement etc.. Many medical experts believe that in the process of production of fetal monitoring in the most reliable way is to CTG and biochemical tests used together. This is done in order to find and identify CTG abnormal condition, whether there will be a case of fetal hypoxia, so as to reduce the false positive rate of CTG, to prevent unnecessary obstetric intervention, so as to reduce the mortality rate of fetal and early neonatal illness risk.

CTG notice in good condition than fetal problems with the rate of fetal notice is much higher, when the CTG positive time, also need to refer to other data, such as whether the contaminated amniotic fluid, maternal age, pregnancy and so on, but also consider the production process status and ultrasound monitoring data, so as to make treatment plan the best.