2023年12月20日 · Shoulder dystocia is a complication of vaginal delivery that occurs when the anterior fetal shoulder becomes impacted behind the maternal pubic symphysis. Less commonly, it occurs when the posterior shoulder becomes lodged behind the maternal sacral promontory.[1]
Shoulder dystocia is a condition that happens when one or both of your baby’s shoulders get stuck during vaginal delivery. There are no signs and no way to prevent the condition. Causes may include having a large baby, having a small pelvis or being in the wrong position. Severe complications can occur, including nerve injuries to your baby.