BRIDGEPORT, Pa. -- The top teams in the nation remain the same as Stanford University and Occidental College held onto their No. 1 preseason national rankings for the 12th week in a row to top the Women's Varsity Top 20 and Division III Top 10 polls released today by the Collegiate Water Polo Association.

In the CWPA polls, defending conference champion the University of Michigan continues at No. 1 in the league's Division I poll, while Carthage College takes over in the top spot in the Division III rankings.

Voted on by a panel of coaches and administrators from around the country during the preseason and each week of the season based on the cumulative results of each team, the Varsity Top 20, Division III Top 10 and Collegiate Water Polo Association Top 10 polls are released on Wednesday during the season until the week following the National Collegiate Athletic Association (NCAA) Championship.

Women's Varsity Top 20

Stanford University remains a unanimous selection at No. 1 in the nation as the Cardinal garnered 100 points to remain unchallenged in the April 13 Women's Varsity Top 20 Poll.

Ranked No. 1 in the preseason (98 points), and the first two polls of the regular season (99 points), the Cardinal clinched a unanimous spot on top of the poll nine weeks ago and remain the consensus pick as the top program in the nation.

The first 11 positions in the poll remain consistent bar the No. 4 University of California-Los Angeles Bruins moving up to No. 3 following a victory over the formerly No. 3 ranked Trojans of the University of Southern California.

Positions No. 12-20 underwent radical changes as Hartwick College improves two places to take over at No. 12 and drop Indiana Univeristy back to No. 13.

California State University-Northridge and the University of California-Davis also improve two places by jumping up to No. 14 and 15, respectively, with the University of California-Santa Barbara sliding back to No. 16.

Princeton University and University of the Pacific both move up to tie at No. 17, with Long Beach State University and the University of California-San Diego rounding out the Top 20.

Women's Varsity Division III Top 10

Occidental College retains its position as the No. 1 small college team in the nation in the April 13 Women's Varsity Division III Poll.

Occidental, which has held the No. 1 ranking since the preseason poll, continues to  remain in front of the University of Redlands but saw its lead dwindle to only three points this week.

Behind Occidental and Redlands, Claremont-Mudd-Scripps Colleges and Whittier College remain steady at No. 3 and 4.

California Lutheran University, which was tied with Pomona-Pitzer Colleges at No. 5 last week, assumes sole possession of the ranking in this week's balloting as Pomona-Pitzer drops back to No. 6.

The biggest surprise of the week is Carthage College which climbs three places to tie Chapman University at No. 7 on the strength of a victory over Grove City College during the weekend.  

Grove City stays at No. 9, while the University of La Verne completes the poll at No. 10.

Women's Varsity CWPA Division I Top 10

The University of Michigan continues to stand on top of the league poll as the three-time defending CWPA Eastern Champions are a unanimous selection once again for the top position in the April 13 Women's Varsity CWPA Division I Poll.

Behind the Wolverines,  the remainder of the Top 10 mirrors the April 6 Poll as Hartwick College, Indiana University, Princeton University, the University of Maryland, Harvard University, George Washington University, Mercyhurst College, Brown University and Bucknell University remain locked at No. 2-10, respectively.

The sole change in the poll is Gannon University which received 22 points to fall just outside the Top 10 after not receiving a vote last week.

Women's Varsity CWPA Division III Top 5

For the first time this season, a team other than Grove City College reigns in the CWPA Division III Poll as Carthage College climbs to No. 1 in the April 13 Poll.

The Lady Reds, who defeated Grove City over the weekend by a 10-7 score, avenged an 8-7 loss to the Wolverines in last year's CWPA Division  III Eastern Championship. 

Carthage's ranking marks the first time since Washington & Jefferson College rated at No. 1 in the March 3, 2010 poll that a team other than Grove City holds the top spot in the CWPA Division III poll.

Wheaton College jumps to No. 3 this week, with W&J and Chatham University rounding out the Top Five.