Career
In 2012 she competed at the Summer Olympics for the first time. At the 2012 European Short Course Swimming Championships in Chartres she placed first in the 100 m breaststroke and she set the European record with a time of 1:04.12. At Istanbul 2012 she also placed third in the 100 m breaststroke and first in the 4 × 100 m medley relay.
At the 2013 Danish Open Championships she broke the European record in the 200 m breaststroke (long course) swimming in 2:20.53.
The previous record belonged to Russian Yuliya Yefimova who had set a time of 2:20.92 at the 2012 London Olympics. At the 2013 World Aquatics Championships, Møller Pedersen broke Rebecca Soni"s 200 m breaststroke world record in the semifinals with 2:19.11, but she finished 2nd in the final behind Russian Yuliya Yefimova with a time of 2:20.08.