title: Annual androgen rhythm in the spiny-tailed lizard, Uromastix hardwicki.
mesh_terms: D000818:Animals; D008116:Lizards / Q000502:physiology*; D008297:Male; D009929:Organ Size; D010507:Periodicity; D012621:Seasons; D013091:Spermatogenesis; D013737:Testis / Q000502:physiology; D013739:Testosterone / Q000502:physiology*
chemical_list: D013739:Testosterone