title: Measurement of progesterone receptors in human breast tumors using the synthetic progestin 16 alpha-ethyl-21-hydroxy-19-nor-4-pregnene-3,20-dione.
mesh_terms: D001943:Breast Neoplasms / Q000378:metabolism*; D002352:Carrier Proteins / Q000378:metabolism; D005260:Female; D006801:Humans; D009652:Norpregnenes / Q000032:analysis; D011282:Pregnenediones / Q000032:analysis*; D011980:Receptors, Progesterone / Q000032:analysis*
chemical_list: D002352:Carrier Proteins; D009652:Norpregnenes; D011282:Pregnenediones; D011980:Receptors, Progesterone; C020175:16 alpha-ethyl-21-hydroxy-19-nor-4-pregnene-3,20-dione