During normal delivery, if you encounter shoulder dystocia, what is the next measure.
Ref. The Short Textbook of Obstetrics. Page. 227
 
Management of shoulder dystocia –

Extra help to be called (paediatrician and anesthetist to b informed )
Mc Roberts Maneuvre : Abduct the maternal thighs and sharply hyperflex them onto abdomen .
Woods manoeuver: General anaesthesia is administered .The posterior shoulder is rotated to anterior position (180 degree ) by a corkscrew movement .
Extraction of the posterior arm