PROCEDURE FOR PROCUREMENT, PREPARATION AND SHIPMENT OF TISSUE SPECIMENS Ovarian arterial and venous specimens will be collected for analysis of AVP peptide and for AVP and vasopressin receptor mRNA. Operating room personnel will be asked to keep the tissue, ovarian artery and vein segments, fresh and not put it in fixative. Promptly following removal of the tissue, the specimens will be prepared as follows: The most sterile primary tissue will be cut to measure at least 5.0 cm in length. The tumor tissue will then be separated from as much connective tissue as possible. The specimen will be placed in the RNA preservative RNAlaterTM, placed on wet ice and sent to the Department of Clinical Investigation Laboratories quickly. Laboratory analyses of AVP peptide and for AVP and vasopressin receptor mRNA isolation and quantitation will be performed in the Physiology and Research Pharmacology laboratories of the Department of Clinical Investigation.