title: Absent end-diastolic flow in first trimester umbilical artery.
mesh_terms: D001783:Blood Flow Velocity; D003971:Diastole; D005260:Female; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D012039:Regional Blood Flow; D014469:Umbilical Arteries / Q000502:physiology*