title: Immunoreactive beta-endorphin and pro-gamma-melanotropin in the peripheral circulation during the menstrual cycle.
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D009074:Melanocyte-Stimulating Hormones / Q000097:blood*; D008597:Menstrual Cycle; D010446:Peptide Fragments / Q000097:blood*; D011333:Pro-Opiomelanocortin / Q000097:blood*; D001615:beta-Endorphin / Q000097:blood*
chemical_list: D010446:Peptide Fragments; D001615:beta-Endorphin; D011333:Pro-Opiomelanocortin; D009074:Melanocyte-Stimulating Hormones