title: Classic illustration.
mesh_terms: D005260:Female; D006801:Humans; D007022:Hypotension / Q000209:etiology / Q000503:physiopathology / Q000517:prevention & control*; D011187:Posture; D011247:Pregnancy; D011249:Pregnancy Complications, Cardiovascular / Q000209:etiology / Q000503:physiopathology / Q000517:prevention & control*; D014682:Vena Cava, Inferior / Q000503:physiopathology*; D014690:Venous Pressure