Boston held a one-goal lead and a commanding 21-9 shots advantage through two periods.

But two third-period penalties proved costly, as host Toronto scored a pair of power-play goals in the final period to capture a 2-1 win over Boston during Professional Women’s Hockey League action Wednesday before a crowd of 2,525 at the Mattamy Athletic Center in Toronto.

Sidney Morin gave Boston a 1-0 lead with a power-play strike at 11:21 of the opening period. Assists were collected by Jamie Lee Rattray, her eighth of the season, and Jessica Digirolamo.

But penalties to Lexie Adzija (tripping) and Sophie Shirley (hit to head) put Toronto on the power play twice in the third and the hosts capitalized both times.

Renata Fast tallied at 2:14 and Natalie Spooner scored at 7:05 for the game-winning goal. It was Spooner’s 13th of the season. Erica Howe was strong between the pipes for Toronto. Emma Soderberg made 19 saves for Boston.