The fetal heart is unstable is a more serious situation, because the fetal heart to a large extent, will affect the development of the fetus and life safety, found that the fetal heart is unstable must be timely conditioning, in general, the fetal heart beats at 110-160 beats per minute are normal, if not in this normal range, pregnant women should pay great attention to the following methods of conditioning: 1, pregnant women should promptly find out The reason for the unstable fetal heart, unhealthy diet or overworked pregnant women may cause unstable fetal heart. Pregnant women should eat regularly, eat food with high nutritional value and easy to digest, pregnant women should not do heavy housework, but also avoid strenuous exercise, otherwise it will easily lead to a rapid heart rate; 2, if the heart rate is too fast, pregnant women can choose to sleep in a left-lying position, which can effectively alleviate the rapid heart rate; 3, fetal oxygen deficiency may also lead to fetal heart instability, pregnant women need to go to the hospital for oxygen therapy.