title: Assay of progesterone receptor binding sites with 17,21-dimethyl-19-norpregna-4,9-diene-3,20-dione and 16alpha-ethyl-21-hydroxy-19-nor-4-pregnene-3,20-dione as the radioactive ligands [proceedings].
mesh_terms: D000818:Animals; D005260:Female; D006801:Humans; D009652:Norpregnenes / Q000378:metabolism; D045167:Progesterone Congeners / Q000378:metabolism; D011397:Promegestone / Q000378:metabolism; D011869:Radioligand Assay / Q000379:methods; D051381:Rats; D011980:Receptors, Progesterone / Q000032:analysis*
chemical_list: D009652:Norpregnenes; D045167:Progesterone Congeners; D011980:Receptors, Progesterone; D011397:Promegestone