CORVALLIS, Ore. (AP) -- Nnemkadi Ogwumike had 27 points and nine rebounds to lead No. 3 Stanford to a 78-45 win over Oregon State on Thursday night.
Chiney Ogwumike added 10 points and Joslyn Tinkle had seven points and 14 rebounds for Stanford (23-1, 14-0 Pac-12), which led by 20 at halftime and as many as 38 in the second half.
Alyssa Martin scored 11 points for Oregon State (17-8, 8-6), which had won six straight.
The Cardinal have won 20 straight games this season, 25 in a row against Oregon State and 71 consecutive games versus Pac-12 teams.
Stanford shot 29 of 61 (47.5 percent) from the floor, while Oregon State was 19 of 57 (33.3). The Cardinal went 10 of 22 on 3-pointers, including three apiece by Toni Kokenis and Bonnie Samuelson.
Both teams struggled early on offense. Stanford led 8-2 after Chiney Ogwumike's basket a little more than seven minutes into the game.
But the Cardinal soon pulled away. Lindy La Roque scored the last five points of a 15-2 run that put Stanford ahead 23-7. Nnemkadi Ogwumike, who shot 10 of 16 overall, later scored six straight points for a 31-9 Cardinal lead.
Stanford led by as many as 22 in the first half and 36-16 at halftime, led by Nnemkadi Ogwumike's 16 points.
In the first meeting between the teams this season, Stanford came away with a 67-60 win at home on Jan. 7. Oregon State led 35-31 at halftime after holding Stanford to 12-of-33 shooting.
The Beavers still had a lead with less than 11 minutes left in that game before the Cardinal went on to lead by double digits.