title: In vitro observations on the function of the sino-atrial node in the human fetus, with a comment on the fetal heart rate throughout pregnancy.
mesh_terms: D001285:Atropine / Q000494:pharmacology; D003042:Cocaine / Q000494:pharmacology; D005260:Female; D005318:Fetal Heart / Q000187:drug effects / Q000502:physiology*; D005865:Gestational Age; D006334:Heart Function Tests; D006339:Heart Rate; D006801:Humans; D009991:Oscillometry; D011247:Pregnancy; D011433:Propranolol / Q000494:pharmacology; D012849:Sinoatrial Node / Q000196:embryology / Q000502:physiology*
chemical_list: D001285:Atropine; D011433:Propranolol; D003042:Cocaine