the hypothalamic systems secreting corticotropin-releasing hormone ( crf ) , somatostatin , oxytocin , vasopressin and luteinizing hormone-releasing hormone ( lhrh ) were characterized using immunochemistry , and variations were studied in relation to the recrudescence of testicular activity in the ferret and the mink , two species with opposite photoregulation of their annual reproductive cycles .
C0023610
luteinizing hormone-releasing hormone
C0035150
reproductive