When does the cardiac output returns to pre pregnancy state?

ANSWER: (B) 4 weeksREF: Dutta's obs 6th edp. 53Cardiac output in pregnancy:Starts to increase from 5th week of pregnancy, reaches its peak to 40-50% of baseline at about 30-34* weekCO is highest in right or left lateral or knee chest position and lowest in supine or sitting positionCardiac output is higest post delivery.Return to pre labour values by 1 hour and pre-pregnant levels by 4th week.