title: Serum levels of 5-HT and urinary excretion of 5-HIAA in women in early pregnancy.
mesh_terms: D000033:Abortion, Threatened / Q000097:blood*; D005260:Female; D006801:Humans; D006897:Hydroxyindoleacetic Acid / Q000652:urine*; D011247:Pregnancy; D012701:Serotonin / Q000097:blood*
chemical_list: D012701:Serotonin; D006897:Hydroxyindoleacetic Acid