title: Effect of increasing day length and intermittent lighting schedules in the domestic hen on plasma concentrations of luteinizing hormone (LH) and the LH response to exogenous progesterone.
mesh_terms: D000818:Animals; D002645:Chickens / Q000502:physiology*; D005260:Female; D008027:Light; D007986:Luteinizing Hormone / Q000097:blood*; D010507:Periodicity; D011374:Progesterone / Q000494:pharmacology; D012741:Sexual Maturation / Q000528:radiation effects*
chemical_list: D011374:Progesterone; D007986:Luteinizing Hormone