The fusion of cells with one- and two-cell mouse embryos.

Animals Anura Bone Marrow Cells Bone Marrow Transplantation Cell Biology Cell Differentiation Cell Division Cell Fusion Cell Nucleus Cells, Cultured Chromosomes Cytoplasm Embryonic and Fetal Development Female Fertilization Hybrid Cells In Vitro Techniques Methods Mice Mice, Inbred Strains Micromanipulation Mitosis Nuclear Transfer Techniques Ovum/cytology,growth & development Parainfluenza Virus 1, Human Pregnancy Pregnancy, Animal Pseudopregnancy Rats Spleen/cytology,transplantation Time Factors Transplantation, Heterologous