title: The development of our knowledge of foetal heart activity: with special reference to Denmark.
mesh_terms: D002309:Cardiology / Q000266:history*; D002681:China; D003718:Denmark; D004534:Egypt; D005060:Europe; D005318:Fetal Heart; D006326:Heart Auscultation / Q000266:history*; D049690:History, Ancient; D049691:History, Medieval; D049711:History, Modern 1601-; D006801:Humans