title: Thyroid gonadal interactions in the male domestic duck in relationship with the sexual cycle.
mesh_terms: D000818:Animals; D004372:Ducks / Q000502:physiology*; D008297:Male; D009929:Organ Size; D010775:Photic Stimulation; D012098:Reproduction; D012621:Seasons; D013091:Spermatogenesis; D013737:Testis / Q000502:physiology*; D013739:Testosterone / Q000097:blood / Q000378:metabolism*; D013961:Thyroid Gland / Q000378:metabolism*; D013974:Thyroxine / Q000494:pharmacology; D014316:Tritium
chemical_list: D014316:Tritium; D013739:Testosterone; D013974:Thyroxine