title: Seasonal changes in the activity of the thyroid glands and its interaction with testicular function in the pied flycatcher Ficedula hypoleuca.
mesh_terms: D000818:Animals; D001683:Biological Clocks; D001717:Birds / Q000502:physiology*; D008297:Male; D011441:Propylthiouracil / Q000494:pharmacology; D012098:Reproduction; D012621:Seasons; D013737:Testis / Q000033:anatomy & histology / Q000187:drug effects / Q000502:physiology*; D013739:Testosterone / Q000494:pharmacology; D013961:Thyroid Gland / Q000033:anatomy & histology / Q000187:drug effects / Q000502:physiology*; D013974:Thyroxine / Q000494:pharmacology
chemical_list: D013739:Testosterone; D011441:Propylthiouracil; D013974:Thyroxine