Fetal breathing--animal studies.
D000818:Animals; D002628:Chemoreceptor Cells; D005260:Female; D005333:Fetus / Q000502:physiology*; D008954:Models, Biological; D011247:Pregnancy; D012119:Respiration; D012143:Respiratory Physiological Phenomena; D012137:Respiratory System / Q000294:innervation; D012756:Sheep / Q000502:physiology*