title: The ova in vertical transmission of leukemia.
mesh_terms: D000818:Animals; D046508:Culture Techniques; D005187:Fallopian Tubes / Q000382:microbiology; D005260:Female; D005347:Fibroblasts; D007942:Leukemia, Experimental / Q000235:genetics*; D051379:Mice; D008854:Microscopy, Electron; D010063:Ovum / Q000382:microbiology*; D013950:Thymus Gland / Q000382:microbiology