title: The possible significance of the presence of C-type virus particles in placenta of normal healthy Sprague-Dawley rats.
mesh_terms: D000818:Animals; D005260:Female; D005796:Genes; D000882:Haplorhini; D006801:Humans; D008253:Macaca mulatta; D008297:Male; D051379:Mice; D009369:Neoplasms / Q000635:transmission / Q000662:veterinary; D010215:Papio; D010920:Placenta / Q000382:microbiology* / Q000648:ultrastructure; D011247:Pregnancy; D051381:Rats / Q000382:microbiology*; D012190:Retroviridae / Q000302:isolation & purification*