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Rohaya, R.; Ana Persari, D.; Novita, N.; Wahyuni, S.; Jamila, J.; Kamalia, R. The Effect Of Counterpressure With A Birthball On Reducing Labor Pain During The First Active Phase: The Effect Of Counterpressure With A Birthball On Reducing Labor Pain During The First Active Phase. NURSING UPDATE 2024, 15, 114-123.