Aug 31 (Reuters) - Marie-Philip Poulin rattled home the winner in overtime as Canada defeated the United States 3-2 in Calgary on Tuesday to claim their first women"s ice hockey world championship since 2012. Five-time defending champions United States jumped out to a 2-0 lead in the first period behind a pair of goals by Alex Carpenter. But Canada tightened up their defense and stepped up their offense in the second, pulling level at 2-2 on goals by Brianne Jenner and Jamie Lee Rattray. A wild third period produced a flurry of penalties but no goals, leading to the three-on-three, sudden-death overtime. Canada controlled the extra period, where Poulin took a feed from Jenner and rifled a shot that ricocheted off the bar before landing in the goal for the win, a score that was confirmed by replay. Canada"s Blayre Turnbull injured herself amid the celebrations but then rejoined her team mates on the ice sitting up on a stretcher, a smile plastered on her face and a gold medal around her neck. Earlier on Tuesday, Finland defeated Switzerland 3-1 to claim bronze.