The fetal heart rate is very important during pregnancy, because if there is no fetal heart rate, it means that the fetus has not developed normally, and even there may be fetal arrest, which is quite serious. Therefore, it is important to pay close attention to all aspects of the fetus during pregnancy. So what situations can cause the absence of fetal heart rate?
Firstly, it is possible that the time of conception is relatively short. If a color ultrasound examination is performed at a young age during pregnancy, the fetal heart rate may not be visible because the fetus has not yet fully developed or the fertilized egg has not yet implanted. In this case, the fetal heart rate cannot be detected.
Secondly, placental abnormalities. If there are abnormalities in the placenta during early pregnancy, it can be hindered due to incomplete development of the trophoblast layer or the influence of placental villous degeneration, leading to the absence of fetal heart rate.
Thirdly, pregnant women may have endocrine disorders, and some women may have insufficient progesterone, which can easily lead to developmental disorders. This may result in the inability of the embryo to develop and grow normally, and it is also easy to experience a lack of fetal heart rate.
Fourthly, if the fetus experiences hypoxia and is found to have no fetal heart rate during testing, it is highly likely that it is related to fetal hypoxia. There are also many reasons that can lead to hypoxia, such as umbilical cord disease.
