title: Serum immunoreactive relaxin in women during a 24-h period.
abstract: Serum relaxin concentrations were measured every 30 min during a 24-h period in nonpregnant and pregnant women. Relaxin was undetectable in all serum samples obtained from 3 nonpregnant women. Relaxin was detectable in all serum samples obtained from 2 pregnant women. However, neither episodic secretion of relaxin nor a 24-h rhythm in relaxin secretion was discernible in these women.
mesh_terms: D000328:Adult; D002940:Circadian Rhythm; D005260:Female; D006801:Humans; D011247:Pregnancy / Q000097:blood*; D011863:Radioimmunoassay; D012065:Relaxin / Q000097:blood* / Q000276:immunology
chemical_list: D012065:Relaxin