Hamster 2-cell embryos were transferred to recipients to provide information on the block to
development in vitro. Previous attempts to elucidate this block have focused on possible …

The rabbit zygote and/or embryo has been one of the most responsive to development in
vitro. All the preimplantation stages have undergone development in culture. Fertilization in …

Almost fifty years have passed since 1949 when Dowling (14) used an egg-saline medium,
developed by Hammond (26) for mouse embryos to culture 8-cell bovine embryos to the 16 …

The development of 1-cell mouse zygotes to the blastocyst stage in vitro has been used as a
quality control for the media employed for human in vitro fertilization and embryo transfer …

One‐cell and two‐cell embryos from three random‐bred strains of mice–CF1, Dub:(ICR),
and CFW (Swiss‐Webster)–were cultured to the blastocyst stage in Spindle's, Earle's, Ham's …

ABSTRACT A microinjection technique has been devised for labelling individual
blastomeres of preimplantation mouse embryos with a marker drop of inert silicone fluid …

The isolated mammalian embryo is a relatively unexploited developmental system for
studying early somite stages: the embryonic period of greatest susceptibility to …

The origin and potential uses of the method of egg transfer in mammals are briefly surveyed.
An experiment is described in which genetically labelled fertilized mouse eggs were …

The behaviour of groups of cells was studied in culture during preimplantation mouse
development. The following observations were made with intact embryos minus the zona …

The optimal oxygen tension for development of preimplantation mouse embryos to the
blastocyst stage in vitro was found to be between 2.5% and 5%. One‐and two‐cell embryos …