It is also normal for the fetal heart to be on one side during twin pregnancy. Before mid-pregnancy, because the fetus is relatively small, the fetal position is not fixed, so when listening to the fetal heartbeat, the fetal heartbeat may appear on one side of the phenomenon. The position of the fetal heartbeat is also related to the position of the fetus, and the fetal heartbeat will constantly change position as the fetus moves. As long as the fetal heart rate is within the normal range and there are no abnormalities in the development of the fetus, the measurement of the fetal heart rate during pregnancy is considered normal and does not require special treatment. During pregnancy, you need to check the development of the fetus on a regular basis, especially in the late stage of pregnancy, you also need to do regular fetal heart rate monitoring, and you also need to pay more attention to the fetal movement, if the fetal movement is too frequent or suddenly does not move, it is recommended to consult a doctor in a timely manner.