title: Photoperiod: main proximal and distal factor of the circannual cycle of reproduction in farm mammals.
mesh_terms: D000818:Animals; D000829:Animals, Domestic / Q000502:physiology*; D002417:Cattle / Q000502:physiology; D004971:Estrus; D005260:Female; D005640:Follicle Stimulating Hormone / Q000502:physiology; D006736:Horses / Q000502:physiology; D007774:Lactation; D008027:Light; D007986:Luteinizing Hormone / Q000502:physiology; D008297:Male; D008907:Mink / Q000502:physiology; D010507:Periodicity; D011247:Pregnancy; D011388:Prolactin / Q000502:physiology; D012098:Reproduction; D012621:Seasons; D012726:Sexual Behavior, Animal / Q000502:physiology; D012756:Sheep / Q000502:physiology; D013696:Temperature; D013737:Testis / Q000033:anatomy & histology
chemical_list: D011388:Prolactin; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone