Outside attacker Emily Spencer in the victory had a match-high 20 kills.
Spencer was one of five IPFW players with at least nine kills against North Dakota State (5-11, 2-4 Summit League). Middle attacker Jessie Manwaring had 16 kills, while outside attacker Kendall Wienkes added 11 kills.
In addition, outside attackers Sarah Heckman and Haley Emenhiser both came off the bench for IPFW (15-3, 5-1 Summit League) and each had nine kills.
IPFW in the victory out-hit North Dakota State .230 to .159, including holding the Bison to a match-worst -.136 attack percentage in the fifth game.
Manwaring had two blocks in the final game and finished with a match-high eight blocks.
Spencer had an ace and game-high five kills in the fourth game to help IPFW force a decisive fifth game against the defending conference champions Bison.
With IPFW leading 13-10 in the third game, North Dakota State went on a 10-0 run to take a seven-point lead. However, the Mastodons rallied with a 14-4 run and fought off two game-points to force overtime.
IPFW in the overtime, though, could not convert on a game-point opportunity at 26-25 and North Dakota scored the final three points to win game and take a one-game lead.
In the second game, North Dakota State started on a 5-2 run and would led by as many as six points before eventually winning the game to even the match.
IPFW had more than a .600 attack percentage for most of the opening game and never trailed in the two-point win. In addition, Spencer had a game-high seven kills in the first game.
With this win, IPFW extends its winning streak to a season-high six matches. The Mastodons also remain tied with IUPUI for first place in The Summit League.
This was IPFW's fourth victory against a team that reached the NCAA Tournament last season.
IPFW will continue Summit League play as it travels to play Nebraska-Omaha at 7 p.m. Friday.