Fetal transverse position has little to do with pregnant women lying down frequently. It is generally believed to be caused by the umbilical cord around the neck, excessive amniotic fluid, fetal malformation and so on. 1. Umbilical cord entanglement: the causes are related to the excessive length of the umbilical cord, small size of the fetus, excessive amniotic fluid and frequent fetal movements. When the umbilical cord wraps around the fetus, the fetus is unable to rotate naturally and becomes fixed in a transverse position. 2. Excessive amniotic fluid: The amount of amniotic fluid exceeding 2,000 ml during pregnancy is called excessive amniotic fluid. Excessive amniotic fluid leads to increased mobility of the fetus, which may result in a transverse position. 3. Fetal anomaly: Fetal anomaly may lead to twisting of the fetal body position, resulting in transverse position. In addition, there may be other reasons for fetal transverse position. It is recommended to go to the hospital for timely consultation, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy under the guidance of the doctor.