title: Relaxin immunoactivity in human plasma during a 24-hr period.
abstract: Relaxin was secreted episodically in all 6 human subjects studied. A 24-hr rhythm was detected in the pooled data, with maximum secretion in the early-midmorning hours and a nadir in the early evening.
mesh_terms: D000328:Adult; D002940:Circadian Rhythm; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010507:Periodicity; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011863:Radioimmunoassay; D012065:Relaxin / Q000097:blood*; D012894:Sleep Stages / Q000502:physiology
chemical_list: D012065:Relaxin