title: Preimplantation development of embryos in labrador retrievers.
abstract: Preimplantation development of canine embryos is not well understood. To understand the timing of preattachment embryogenesis relative to the luteinizing hormone (LH) surge, early embryonic development was examined in Labrador Retrievers after artificial insemination. The embryos migrated from the oviduct to the uterus beginning on day 11 after the LH surge. This transport must be completed within 24 h. By day 13 after the LH surge, all of the embryos had moved and were localized in the uterus. The embryos developed to the morula stage within 11-13 days and to the blastocyst stage within 14 days after the LH surge, respectively. These findings add to the current understanding concerning the physiology of preimplantation development and should help further develop assisted reproductive techniques in canine species, such as cryopreservation and subsequent embryo transfer.
authors.affiliation: Research Unit for Functional Genomics, National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Japan.
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Abe
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Suwa
authors.forename: Yoshiko
authors.initials: Y
authors.lastname: Yanagimoto-Ueta
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Suzuki
mesh_terms: D000818:Animals; D001755:Blastocyst / Q000378:metabolism; D015925:Cryopreservation; D004285:Dogs; D010064:Embryo Implantation; D004624:Embryo Transfer / Q000379:methods; D005260:Female; D007315:Insemination, Artificial; D007986:Luteinizing Hormone / Q000378:metabolism; D008954:Models, Biological; D010057:Oviducts / Q000378:metabolism; D027724:Reproductive Techniques, Assisted; D013997:Time Factors; D014599:Uterus / Q000378:metabolism
chemical_list: D007986:Luteinizing Hormone