[Reflections on endometrial osteogenesis. Apropos of 3 cases]

The authors report three cases of endometrial ossification. They believe that the presence of bone in the uterus is associated with two very distinct situations. One is the retention in utero of fragments of foetal bone after a late abortion. In this case, the bone fragments have a recognisable morphology and a well differentiated structure. The other situation is osseous metaplasia of elements which they believe to be of Mullerian origin, arising in the myo-endometrial transitional zone.