The Class X student of the school had delivered a baby in the hostel on Friday night, they said.
Following the incident, the Kandhamal district administration suspended headmistress of Lingagada Residential Girls High School Ashalata Pati and disengaged contractual teachers, Sasmita Parida and Namita Pradhan yesterday, they said.
An auxiliary nurse midwife (ANM) S B Pradhan, responsible for the health care of the students, was also removed.
Police said they had registered a case in connection with the incident based on a complaint lodged by Khajuripada block extension officer.