The Differentiation of Rat Ova During Cleavage

1. Introduction and Notes on Materials and Methods.- 2. Submicroscopic Structure and Ultracytochemistry of Segmenting Rat Ova.- 2.1. One-Cell Ovum.- 2.2. Two-Cell Ovum.- 2.3. Four-Cell Ovum.- 2.4. Eight-Cell Ovum.- 2.5. Morula.- 2.6. Early Blastocyst.- 2.7. Late Blastocyst.- 2.8. Conclusion.- 3. Morphologic and Functional Relationship During the Cleavage of Mammalian Ova.- 3.1. Surface Coats and Cell Contacts of the Ovum, Their Differentiation and Function During Cleavage.- 3.2. Nucleus, Nucleoprotein Structures, and Proteosynthesis in the Segmenting Ova.- 3.3. Mitochondria and Energetic Metabolism of Segmenting Ova.- 3.4. Lysosomes and Their Importance for the Differentiation and Nutrition of the Segmenting Ovum.- 3.5. Occurrence of Stored Material and Its Metabolism in Segmenting Ova.- Summary.- References.