This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
Increase in cardiac output seen in pregnancy is:March 2010 
Select and explain. 
A. 10%, B. 20%, C. 30%, D. 40%
D: 40%
Answer: D: 40% 
Explanation: Ans. D: 40%The cardiac output stas to increase from 5t1 week of pregnancy and reaches its peak 40-50% at about 30-34 weeks. Cardiac output increase fuher during labour (+50%) and immediately following delivery (+70%)