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Richard Hartog, Associated Press
Stanford forward Taylor Greenfield, left, and guard Toni Kokenis, right, battle for a loose ball with UCLA forward Rhema Gardner during the first half of an NCAA college basketball game, Saturday, Dec. 31, 2011, in Los Angeles.

LOS ANGELES — Nnemkadi Ogwumike and Chiney Ogwumike posted double-doubles for the second straight game to lead No. 4 Stanford past UCLA 77-50 Saturday, handing the Bruins their 12th consecutive loss against the perennial Pac-12 women's powerhouse.

Nnemkadi Ogwumike had 18 points and 10 rebounds, her sister Chiney had 15 points and 11 rebounds, and Toni Kokenis added 11 points for the Cardinal (11-1, 2-0), which won their eighth in a row and extended their league winning streak to a record 59 games.

UCLA's Rebekah Gardner scored 17 points and Markel Walker added 11 for the injury-riddled Bruins (6-7, 1-1). They were without leading scorer and rebounder Atonye Nyingifa, who tore her right ACL in a loss to Tennessee on Dec. 17 and is out for the season. They had already lost Jasmine Dixon, who ruptured her Achilles tendon in September.