There are many causes of transverse fetal position, such as laxity of the maternal abdominal wall, uterine tumors, and uterine malformations. 1. Maternal abdominal wall laxity. Women are prone to excessive relaxation of the abdominal wall after delivery. Due to excessive relaxation of the abdominal wall or separation of the rectus abdominis muscle in women who have had a menstrual delivery, it is easy to lead to transverse position of the fetus. 2. Uterine tumors, pelvic tumors and other occupying lesions, which prevent the longitudinal axis of the fetus from being parallel to the mother and the head of the fetus from articulating, thus forming transverse position. 3. Uterine malformation. For example, uterine abnormalities such as double uterus, saddle-shaped uterus, or non-elliptical uterus of pregnant women, resulting in the head of the fetus can not be fixed and obstructed into the pelvis, which may easily lead to transverse position of the fetus. Fetal transverse position needs to be corrected by external inversion by a specialized doctor if necessary. If the fetus is still in a transverse position at full term, an elective caesarean section is required.