title: Improved method for progesterone determination in milk-fat.
mesh_terms: D000818:Animals; D002417:Cattle; D002850:Chromatography, Gel / Q000379:methods; D005223:Fats / Q000032:analysis*; D005615:Freezing; D008892:Milk / Q000032:analysis*; D011374:Progesterone / Q000032:analysis*; D011863:Radioimmunoassay / Q000379:methods
chemical_list: D005223:Fats; D011374:Progesterone