Research topics include studies of embryonic loss, control of fertility function and regression of the corpus luteum, aging of the oocyte, control of postpartum reproductive performance, environmental factors in reproduction, control of steroidogenesis, control of estrus and ovulation, new methods of artificial insemination, ovarian follicular development, endocrine functions of polypeptides, neuroendocrine control of gonadotropic hormone secretion, and roles of prostaglandins in reproduction. The focus of research is both basic and applied and is almost entirely with farm animals, including poultry.