title: Enigmas and variations among mammalian embryos.
authors: Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Canada.
authors: K J
authors: KJ
authors: Betteridge
mesh_terms: D000818:Animals; D004622:Embryo, Mammalian / Q000502:physiology*; D006801:Humans; D010828:Physiology, Comparative; D012099:Reproductive Techniques