Toni Young scored 20 of her 25 points in the first half to help Oklahoma State beat DePaul 73-56 on Sunday in the first round of the NCAA Tournament’s Norfolk Region in Durham, N.C.Liz Donohoe added 14 points for the seventh-seeded Cowgirls (22-10), who blew nearly all of a 16-point lead before taking back control with a 13-0 run. Young also grabbed 13 rebounds.Oklahoma State shot 46 percent to earn its first tournament win in three years, sending the Cowgirls to Tuesday night’s second round to face No. 2 seed and site host Duke in Cameron Indoor Stadium.Anna Martin scored 12 points for the 10th-seeded Blue Demons (21-12), who managed to pull within a point with about 14 minutes left despite struggling on offense the entire afternoon. But DePaul didn’t score again for 8 1/2 minutes as the Cowgirls rebuilt their double-digit margin.Norfolk Region• No. 2 Duke 67, No. 15 Hampton 51: Tricia Liston scored 13 of her 20 points in the second half and the Blue Devils (31-2) pulled away to beat the Pirates (28-6) in the first round in Durham, N.C. Duke watched Hampton trim their 19-point lead to six before recovering with a 23-8 run that gave them their 20th straight NCAA Tournament-opening victory.• No. 1 Notre Dame 97, No. 16 Tennessee-Martin 64: Jewell Loyd scored 27 points and the Irish (32-1) blew past the Skyhawks (19-15) in Iowa City, Iowa.• No. 9 Iowa 69, No. 8 Miami 53: Samantha Logic had 23 points with 11 rebounds and the host Hawkeyes beat the Hurricanes (21-11). Iowa will next face Notre Dame.Oklahoma City Region• No. 4 Purdue 77, No. 13 Liberty 43: Courtney Moses scored 21 points, hitting 5 of 8 from 3-point range, and the Boilermakers (25-8) routed the Lady Flames (27-7) in Louisville, Ky. The Boilermakers improved to 19-1 in the first round with their 16th straight victory to open the tournament.• No. 5 Louisville 74, No. 12 Middle Tennessee 49: Shoni Schimmel scored 20 points, and the host Cardinals (25-8) beat the Blue Raiders (25-8). The Cardinals will play Purdue on Tuesday in Louisville. Middle Tennessee had won seven in a row. The Blue Raiders have dropped six straight first-round NCAA games.• No. 8 Florida State 60, No. 9 Princeton 44: Leonor Rodriguez and Morgan Toles each scored 12 points and the Seminoles (23-9) beat the Tigers and will face Baylor.Bridgeport Region• No. 6 Delaware 66, No. 11 West Virginia 53: Elena Delle Donne scored 33 points and led a second-half surge that carried the Blue Hens (31-3) past the Mountaineers (17-14) in Newark, Del.• No. 3 North Carolina 59, No. 14 Albany 54: Tierra Ruffin-Pratt scored a career-high 30 points, and the Tar Heels (29-6) squeezed past the Great Danes (27-4) to stagger into the second round against host Delaware. • No. 2 Kentucky 61, No. 15 Navy 41: DaNesha Stallworth scored 18 points and Jennifer O’Neill added nine of her 12 points in the second half to lead the sluggish Wildcats (28-5) over the Midshipmen (21-12) in New York. The Wildcats will play Dayton next.• No. 7 Dayton 96, No. 10 St. John’s 90, 2 OT: Andrea Hoover scored a career-high 24 points and the Flyers (28-2) outlasted the Red Storm (18-13) a double overtime thriller.Spokane Region• No. 1 Stanford 72, No. 16 Tulsa 56: Chiney Ogwumike had 29 points, eight rebounds and three assists, and the Cardinal (32-2) pulled away in the second half to survive a hard-fought effort by the Golden Hurricane (17-17). Up next for Stanford is Michigan.• No. 3 Penn State 85, No. 14 Cal Poly 55: Maggie Lucas scored 19 points, Alex Bentley added 18 and the Nittany Lions (26-5) overwhelmed the tournament newcomer Mustangs (21-11). Penn State will play LSU next.• No. 6 LSU 75, No. 11 Green Bay 71: Danielle Ballard capped a 16-point performance by hitting a key free throw with 4 seconds to go, and the Tigers (21-11) held off the Phoenix (29-3) in Baton Rouge.• No. 8 Michigan 60, No. 9 Villanova 52: Kate Thompson hit a key 3-pointer down the stretch and another late jumper to finish with 17 points, and the Wolverines (22-10) overcame a cold-shooting first half to beat the Wildcats (21-11).