title: A direct progesterone radioimmunoassay.
mesh_terms: D000818:Animals; D005260:Female; D006801:Humans; D008297:Male; D008722:Methods; D011374:Progesterone / Q000097:blood*; D011817:Rabbits / Q000276:immunology; D011863:Radioimmunoassay; D014316:Tritium
chemical_list: D014316:Tritium; D011374:Progesterone