title: Prolactin and growth hormone circadian periodicity in lactating cows.
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D002417:Cattle / Q000502:physiology*; D002940:Circadian Rhythm; D005260:Female; D013006:Growth Hormone / Q000097:blood* / Q000378:metabolism; D007774:Lactation; D011247:Pregnancy; D011388:Prolactin / Q000097:blood* / Q000378:metabolism; D011863:Radioimmunoassay
chemical_list: D011388:Prolactin; D013006:Growth Hormone