1. Prolongued retention of intrauterine bones;Melius;Obstet Gynecol,1991
2. Uterine osseous metaplasia;Bhatia;Obstet Gynecol,1982
3. Iatrogenic fetal implants;Newton;Obstet Gynecol Surv,1972
4. Bone induction evoked in mouse by xenogenic grafts of the transitional epithelium;Wlodarski;Experientia (Basel),1971
5. Formation of tumors containing bone after intramuscular injection of transformed human amnion cells (FL) into cortisone-treated mice;Anderson;Am J Pathol,1964