Endometrial ossification is a rare occurrence, seen in reproductive age group. Patients may have history of endometritis or recurrent abortions. We report a case of endometrial ossification occurring 3 months after a diagnostic curettage done to find out the cause of secondary infertility. This curettage had not revealed any histological abnormality. However, the patient developed intermittent bleeding per vaginum subsequent to the procedure. A repeat curettage was done and endometrial tissue obtained. The diagnosis of endometrial ossification was made on histopathology which showed endometrial tissue intermingled with bony tissue.