Fetal Doppler will likely to be being used at a numerous point of a woman’s carrying a child to test the heart beat of an unborn child. Fetal Doppler is a equipment that was developed following a theory by a one Christian Doppler in the year 1842. It is a apparatus that is currently in use by many doctors and mid wives all over the world. Fetal Doppler is also not dangerous to use at the comforts of your home as it is not known to put the fetus or mother to a risk. The ultrasounds, which is in fact the primary mechanism behind Fetal Doppler check is already permitted by FDA. Fetal Doppler is classified under the class 11 prescription medical instruments, and as a result it is advisable that you get to see a doctor to consent if you are aiming to use it. The technology that is applied in Fetal Doppler is based ion the Doppler shift principle observed by Christian Doppler, which in fact focuses on how the sound waves originating from a moving source can be compressed. The functionality of the Fetal Doppler will be based on the principle of listening to the reflections of the small, high frequency sound waves or the ultrasounds. The ultra sounds are actually generated by the microscopic vibrations of the piezoelectric crystals. Moving objects will primarily stimulate wave form to be reflected. This will primarily take place in the fetal heart and will cause the frequency changes. The changes will be analyzed by the electronics of the Doppler. This will be converted to a audio. It is actually this sound that you will get to hear and the heart rate digital representation that is seen. There is a special ultrasonic gel that is applied on the abdomen of a pregnant woman. This gel is used to shield the probe that is ion the rear of the Fetal Doppler. It also limitslimitsstops any form of noise that may come in conflict with the fetal heart tones. You will have to pass the probe around the belly area of the pregnant woman to be in a position to hear the heart tones of the fetus. This will be done after the gel is applied. Spotting a position to hear the heart tone is mainly the objective that the doctor will be having. Once the doctor gets to hear the tones, they will be in a position to ascertain the rate of the heart beat. On average, for a normal case, there should be heard between 120 and 180 heart beats within a minute. The described beats may not actually apply in all cases. That may not be a case for warning at first. The doctor has to continue checking again and again to determine the normal heart rate. Different fetuses will have different beats, and hence a physician may be required to advise the mother accordingly. Not every hand will be able to do the described tests and give results that will be relied upon to draw inferences. Similarly, not every Fetal Dropper there already in the market is good for use.