Osseous metaplasia of endometrium is a rare clinical entity with presence of mature or immature bone in endometrium. Most of the cases present with secondary infertility following abortion, chronic endometritis. we report a case of osseous metaplasia of endometrium in a 32-year-old patient with a history of infertility following an abortion Endometrial osseous metaplasia is a rare cause of infertility. Its recognition bysonography is an important step in adequate management. It is important to differentiate from intra uterine contraceptive device , foreignbody and mixed mullerian tumor of endometrium