title: Background to delayed implantation and embryonic diapause.
mesh_terms: D000818:Animals; D001755:Blastocyst / Q000502:physiology*; D010872:Caniformia / Q000502:physiology; D003338:Corpus Luteum / Q000502:physiology; D010064:Embryo Implantation; D010065:Embryo Implantation, Delayed; D047108:Embryonic Development; D005260:Female; D007774:Lactation; D008322:Mammals / Q000502:physiology; D008394:Marsupialia / Q000502:physiology; D051379:Mice; D011247:Pregnancy; D051381:Rats; D013997:Time Factors