<prompt> Physiological changes in pregnancy :Decreased residual volumeDecreased GFRDecreased Cardiac outputIncreased Haematocrit  <response>: The functional residual capacity and residual volume are decreased due to elevated diaphragm. GFR increases by 50 Cardiac output increases by 40 Hemoglobin and hematocrit decreases. Reference : Williams Textbook of Obstetrics 24th edition page 62 