Observations of fetal breathing movements transmitted through maternal abdominal wall.
D000009:Abdominal Muscles; D004562:Electrocardiography; D005260:Female; D005333:Fetus / Q000502:physiology*; D005865:Gestational Age; D006801:Humans; D009068:Movement; D010298:Parity; D011247:Pregnancy; D012119:Respiration; D014159:Transducers; D014463:Ultrasonography