title: TRENDS IN PHOTOPHYSIOLOGIC CONCEPTS.
mesh_terms: D000818:Animals; D001683:Biological Clocks; D002940:Circadian Rhythm; D004971:Estrus; D005260:Female; D006801:Humans; D008027:Light; D051379:Mice; D010053:Ovary; D010336:Pathology; D010507:Periodicity; D010827:Physiology; D011200:Poultry; D051381:Rats; D012098:Reproduction; D012106:Research
keywords: BIOLOGICAL CLOCKS; CIRCADIAN RHYTHM; ESTRUS; EXPERIMENTAL LAB STUDY; LIGHT; MICE; OVARY; PATHOLOGY; PERIODICITY; PHYSIOLOGY; POULTRY; RATS; REPRODUCTION