This 1987 ORPRC Symposium on Primate Reproductive Biology, the third in a series, marked the twenty-fifth anniversary of the Oregon Regional Primate Research Center (ORPRC). In organizing these symposia, we have emphasized the dedication of many ORPRC staff members to research with nonhuman primates as models for human reproduction. The first symposium in this series, organized by William Montagna, was held in May 1981. Appropriately for a beginning series, its topic was fetal endocrinology. The subject of this year's symposium was the primate ovary, and, as in the past, scientists from...