title: Comparative Development of Embryonic Age by Organogenesis in Domestic Dogs and Cats.
abstract: The precise determination of the embryonic chronology is very important in reproductive biotechnologies, especially in estimating embryonic age. Thus, there is a need for greater knowledge and standardization for determining the chronology of embryonic development and functional morphology. We describe aspects of embryonic development in two domestic carnivores to add knowledge about organ peculiarities and for application in veterinary practice, in prenatal development and in the biotechnology fields. We found that the development of differential characteristics of embryonic organs occurs in the first trimester of pregnancy for both species. Thus, using the combination of the crown-rump length, macroscopic analysis and optical microscopy, it is possible to predict gestational age more precisely in animals that lack a defined breed and establish an embryonic pattern.
authors.affiliation: Department Surgery, Faculty of Veterinary Medicine and Animal Sciences, University of Sao Paulo, Sao Paulo, SP, Brazil.
authors.forename: Ncg
authors.initials: N
authors.lastname: Pieri
authors.affiliation: Department Surgery, Faculty of Veterinary Medicine and Animal Sciences, University of Sao Paulo, Sao Paulo, SP, Brazil.
authors.forename: A F
authors.initials: AF
authors.lastname: Souza
authors.affiliation: Department Surgery, Faculty of Veterinary Medicine and Animal Sciences, University of Sao Paulo, Sao Paulo, SP, Brazil.
authors.forename: J B
authors.initials: JB
authors.lastname: Casals
authors.affiliation: Department Medicine Veterinary, Faculty of Animal Sciences and Food Engineering, University of Sao Paulo, Pirassununga, SP, Brazil.
authors.forename: Kcs
authors.initials: K
authors.lastname: Roballo
authors.affiliation: Department Surgery, Faculty of Veterinary Medicine and Animal Sciences, University of Sao Paulo, Sao Paulo, SP, Brazil.|Department Medicine Veterinary, Faculty of Animal Sciences and Food Engineering, University of Sao Paulo, Pirassununga, SP, Brazil.
authors.forename: C E
authors.initials: CE
authors.lastname: Ambrósio
authors.affiliation: Department Surgery, Faculty of Veterinary Medicine and Animal Sciences, University of Sao Paulo, Sao Paulo, SP, Brazil.|Department Medicine Veterinary, Faculty of Animal Sciences and Food Engineering, University of Sao Paulo, Pirassununga, SP, Brazil.
authors.forename: D S
authors.initials: DS
authors.lastname: Martins
mesh_terms: D000818:Animals; D002415:Cats / Q000196:embryology*; D018568:Crown-Rump Length; D004285:Dogs / Q000196:embryology*; D047108:Embryonic Development; D005260:Female; D005865:Gestational Age; D038081:Organogenesis; D011247:Pregnancy; D013045:Species Specificity