At 11:59 of the first period in the Ducks/Blues game, Anaheim requested a Coach's Challenge to review the "Interference on the Goalkeeper" decision that resulted in a "no goal" call.
After reviewing all available replays and consulting with NHL Hockey Operations staff, the Referee determined that the actions of St. Louis' Jori Lehtera caused Anaheim's Corey Perry to contact goaltender Jake Allen before the puck crossed the goal line. The decision was made in accordance with Note 2 of Rule 78.7 (ii) which states, in part, "that the goal on the ice should have been allowed because (ii) the attacking Player was pushed, shoved or fouled by a defending Player causing the attacking Player to come into contact with the goalkeeper."
Therefore the original call is overturned - good goal Anaheim Ducks.
Since the Coach's Challenge resulted in the original call being overturned, the Ducks retain their time-out.