Dr. Hildegarde Reynolds Endowed Term Professor of Primary Care Nursing
Professor of Primary Care Nursing, Perelman School of Medicine

Nationally and internationally known for her work with teen mothers, Ann Lawrence O’Sullivan is a pediatric nurse practitioner whose goal has always been to help teen parents delay a second pregnancy. Since she started the Teen-Tot Clinic in 1980 at The Children’s Hospital of Philadelphia (CHOP), Dr. O’Sullivan has studied and cared for teen mothers.

Her research, based largely on questions from her clinical practice, has ranged from her dissertation on adolescent mothers’ decision-making to the value of home visiting programs for teen mothers, and how young mothers care for their children, return to school, and balance roles as student and parent.

“Today’s innovation sometimes sounds like yester year’s nurse work arounds!”


  • PhD, University of Pennsylvania, 1984
  • MSN, University of Pennsylvania, 1972
  • BSN, University of Pennsylvania, 1970
  • Diploma, St. Francis Hospital, 1968