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October, 2006
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Embryo Transfer: The transfer of mammalian embryos from an in vivo or in vitro environment to a suitable host to improve pregnancy or gestational outcome in human or animal. In human fertility treatment programs, preimplantation embryos ranging from the 4-cell stage to the blastocyst stage are transferred to the uterine cavity between 3-5 days after Fertilization in vitro.

Production of Genetically Engineered Golden Syrian Hamsters by Pronuclear Injection of the CRISPR/Cas9 Complex

1Department of Animal, Dairy, and Veterinary Sciences, Utah State University, 2National Centre for International Research in Cell and Gene Therapy, Sino-British Research Centre, School of Basic Medical Sciences, Zhengzhou University, 3Department of Animal Science Division of Applied Life Science (BK21 Plus), Gyeongsang National University, 4Institute of Agriculture and Life Science, Gyeongsang National University, 5Centre for Molecular Oncology, Barts Cancer Institute, Queen Mary University of London

JoVE 56263


A Novel Use of Three-dimensional High-frequency Ultrasonography for Early Pregnancy Characterization in the Mouse

1Devision of Repreoductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Baylor College of Medicine, 2Mouse Phenotyping Core, Baylor College of Medicine, 3Reproductive and Developmental Biology Laboratory, National Institute of Environmental Health Sciences, 4Department of Molecular and Cellular Biology, Baylor College of Medicine

JoVE 56207

 Developmental Biology

Inactivation of mTor: A Tool to Investigate Meiotic Progression and Translational Control During Bovine Oocyte Maturation

1BVN Neustadt/Aisch, 2Faculty of Veterinary Medicine, Clinic for Obstetrics, Gynecology and Andrology of Large and Small Animals, Justus-Liebig-University Giessen, 3Reproductive Cell Biology Unit, Leibniz Institute for Farm Animal Biology, 4Reproductive Biochemistry Unit, Leibniz Institute for Farm Animal Biology

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JoVE 53689

 JoVE In-Press

CRISPR/Cas9-mediated Targeted Integration In Vivo Using a Homology-mediated End Joining-based Strategy

1Institute of Neuroscience, State Key Laboratory of Neuroscience, Key Laboratory of Primate Neurobiology, CAS Center for Excellence in Brain Science and Intelligence Technology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 2College of Life Sciences, University of Chinese Academy of Sciences, 3School of Life Science and Technology, Shanghai Tech University, 4Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences

JoVE 56844


Fundamentals of Breeding and Weaning

JoVE 10293

Source: Kay Stewart, RVT, RLATG, CMAR; Valerie A. Schroeder, RVT, RLATG. University of Notre Dame, IN

Millions of mice and rats are bred for use in biomedical research each year. Worldwide, there are several large commercial breeding facilities that supply mice to research laboratories, but many facilities choose to also breed mice and rats in-house to reduce costs and increase research options. When breeding in the animal facility, researchers are able to manipulate the genetics of the animals, time the pregnancies to meet the needs of the research, and work with embryos and neonates as required. Mice and rats can be bred in a variety of schemes and methods. Technical procedures, such as the use of vaginal cytology, visualization of the vaginal area, and observation of copulatory plugs, have been developed to assist with the synchronization of breeding to correspond to research requirements. This manuscript is an overview of the basic fundamentals of mouse and rat breeding and technical procedures used. More detailed descriptions of the complex breeding schemes, and the full description of the methods for vaginal cytology, are available in the list of references.

 Lab Animal Research

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