title: Ultrastructure of cells in the surface epithelium of the rat uterus during early pregnancy, and the effect of an interauterine device.
mesh_terms: D000818:Animals; D004848:Epithelium / Q000648:ultrastructure; D005260:Female; D007434:Intrauterine Devices; D011247:Pregnancy; D051381:Rats; D014599:Uterus / Q000648:ultrastructure*