This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diabetes Mellitus, Subject name: Gynaecology & Obstetrics
Which is the most common complication during vaginal delivery in diabetic women? 
Select and explain. 
A. Uterine inertia, B. Shoulder dystocia, C. Obstructed labour, D. Post partum haemorrhage
B: Shoulder dystocia
Answer: B: Shoulder dystocia 
Explanation: Ans: B (Shoulder dystocia) Ref: Current diagnosis & treatment - Obstetrics and Gynaecology iOth edition pg 316.Explanation:Shoulder dystocia is the most common complication encountered in diabetic women during vaginal del ivery, especially when the baby is niacrosomic.Uterine inertia and PPH can occur if hydramnios is present.Maternal complications of DMAbortionPreterm labourPre eclampsiaPolyhydramnios,Fetal complications of DMHydramniosBig babyShoulder dystociaFetal macrosomiaSacral agenesisAnencephaly and microcephalyVSDNeonatal complicationsHypoglycemia.ARDSHyperbilirubinemiaPolycythemiaHypocalcemia