Most fetal arrhythmias do not require special management because there are no significant adverse effects on normal development. Arrhythmias, a collective term for a large group of cardiac disorders, include sinus arrhythmias, premature atrial beats, premature ventricular beats, etc. The vast majority of arrhythmias found in the fetus are sinus arrhythmias. Simple sinus arrhythmia in the fetus is usually physiological, not associated with organic heart disease, and does not affect normal development. The first thing you need to do is to make sure that you have a good night’s rest and that you don’t stay up too late to get enough sleep. 2. Because strong tea and coffee, containing theophylline, caffeine, for the cardiovascular system, has a significant excitatory effect, not only affect the pregnant woman’s heart rate, but also may affect the fetal heart rate.