O'Donnell's clutch goal 27 seconds into overtime gave Missy Doherty her 100th win as head coach of the Nittany Lions.
Despite taking a 7-2 lead in the early going, Penn State couldn't find an answer for Princeton's staunch defense in the second half.
Freshman goalkeeper Lucy Lowe notched a career-high 10 saves, while Maria Auth led the offense with five points in Saturday's Big Ten opener.
The Penn State Gender Equity Center is bringing panels for students and the community to learn more about religion and gender equity in honor of Women's History Month.
Sophomore attacker Maria Auth led the Nittany Lions with a career-high six goals in Wednesday's lopsided win at Panzer Stadium.
Maria Auth's five-point game helped the Nittany Lions cruise past the Great Danes Sunday in New York.