Relaxin Localization in Porcine and Bovine Ovaries by Assay and Morphologic Techniques.- Discussion.- Bioassay Methods for Relaxin: Uses, Pitfalls.- Discussion.- Isolation and Characterization of Porcine and Rat Relaxin.- Discussion.- On the Structure and Function of Relaxin.- Discussion.- Chemical Studies on Relaxin.- Discussion.- The Topography of Porcine Relaxin: Location of the Tryptophan Residues.- Discussion.- Messenger RNA Dependent Synthesis of a Protein Containing Relaxin Related Sequences.- Discussion.- Chemistry of Bovine Relaxin.- Discussion.- Isolation and Characterization of High Molecular Weight Forms of Relaxin.- Discussion.- Need for Human Relaxin.- Discussion.- Radioimmunoassay of Relaxin.- Discussion.- The Effects of Relaxin on Cyclic-AMP and Ornithine Decarboxylase Levels in Target Tissues.- Discussion.- Effects of Porcine Relaxin on Cyclic Nucleotide Levels and Spontaneous Contractions of the Rat Uterus.- Discussion.- Relaxin Receptors and a Study of the Physiological Roles of Relaxin.- Discussion.- Effect of a Purified Porcine Relaxin Upon Glycogen and Protein in the Rat Uterus.- Discussion.- Target Tissues for Relaxin.- Discussion.- Effect of Relaxin on Mammary Growth in the Hyposectomized Rat.- Discussion.