Objective: To present two cases of patients diagnosed of endometrial osseous metaplasia related with infertility and their hysteroscopic approaching.
 Design: Case report.
 Setting: Two clinical cases diagnosed and treated at Institutional University Hospital. Patients: Two premenopasual women diagnosed and treated in our Center.
 Interventions: Transvaginal ultrasound scan, diagnostic hysteroscopy and hysteroscopic removal of bone fragments. Main Outcome Measures: Ultrasound scan during further clinical follow up.
 Results: Both patients underwent a diagnostic hysteroscopy, and removal of all the bone fragments with total resolution of their pathology.
 Conclusions: Endometrial osseous metaplasia is a rare pathology that should be suspected in patients with a history of secondary infertility, several miscarriages and curettages, that present with an ultrasound image compatible with an intrauterine device. Hysteroscopic approach is the best diagnostic and therapeutic option.
 
 Key words: Endometrial osseous metaplasia, bony intrauterine tissue, miscarriage, infertility, hysteroscopy, unadverted intrauterine device.