In a case of alleged negligence, medical staff at Fortis Hospital, Noida forgot the piece of gauze inside the 33-year-old woman's stomach on December 23, 2013 when she gave birth to a baby.
A statement by the Fortis Hospital authorities said they "have constituted a committee which is presently investigating into the matter".
Since the woman was discharged from the hospital three days after the surgery, she had been complaining about severe abdominal pain. Last month, she underwent fresh tests at the hospital when a 'foreign element' was spotted in her stomach, a family member said.
The family member said they had filed a complaint with police against the private hospital.