title: A comparison of the fine structure of late mouse blastocysts developed in vivo and in vitro.
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D002478:Cells, Cultured; D004622:Embryo, Mammalian / Q000166:cytology*; D004707:Endoderm; D005260:Female; D008297:Male; D008722:Methods; D051379:Mice / Q000196:embryology*; D008815:Mice, Inbred Strains; D008854:Microscopy, Electron; D011247:Pregnancy; D013997:Time Factors