title: Circadian rhythms of serum calcium in hens and the relationship of serum calcium to shell quality.
mesh_terms: D000818:Animals; D002118:Calcium / Q000097:blood*; D002645:Chickens / Q000097:blood* / Q000502:physiology; D002940:Circadian Rhythm; D004528:Egg Shell; D005260:Female; D006321:Heart; D010058:Oviposition; D011201:Poultry Diseases; D011677:Punctures / Q000009:adverse effects; D013312:Stress, Physiological / Q000662:veterinary
chemical_list: D002118:Calcium