Shoulder dystocia occurs in some cases of delivery of child. It occurs when head of the infant is delivered normally, but one shoulder becomes stuck under part of the mother’s pelvic bones..
Shoulder dystocia is dangerous to both the mother and the baby. Shoulder dystocia is very likely to cause brachial plexus and other injuries.
Women who are short or who have had gestational diabetes are at greater risk for the occurrence of shoulder dystocia. So are women with pelvic abnormalities. Prolonged labor also increases the risk.
Use of forceps or a vacuum extractor increases the risk of shoulder dystocia.