The fetal position LST represents breech position, which means that the fetal head is located in the upper abdomen, the fetal buttocks is located in the lower abdomen, and the fetal sacrum is located on the left side of the mother’s pelvis, which is called sacral left anterior fetal position, which is an abnormal fetal position. Breech position is the most common kind of abnormal fetal position, which can be diagnosed by doing ultrasound or abdominal palpation. Breech position is more risky to deliver vaginally, and is prone to cord prolapse, premature rupture of membranes, fetal distress, and difficulty in posterior emergence during delivery, so most of the breech positions will be chosen for cesarean delivery. The breech position is not completely uncorrectable. Between 28-32 weeks if the fetal position is determined to be breech, as long as there are no contraindications you can try to perform chest and knee position and external transfer, the probability of success can reach more than 50%. However, there are risks in performing these operations, so they must be performed under the guidance of a professional doctor, and preferably in a hospital.