This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Medical & Surgical Illness Complication Pregnancy, Subject name: Gynaecology & Obstetrics
Maximum cardiac output in pregnancy is at: 
Select and explain. 
A. 20 weeks, B. 24 weeks, C. 26 weeks, D. 28 weeks
D: 28 weeks
Answer: D: 28 weeks 
Explanation: Ans. is d, i.e. 28 weeksRef. William 24/e, p 59The following graph of Williams shows cardiac output during pregnancy and labor.As is clear from the graph cardiac output is maximum at 28-32 weeks of gestation.Note: At term cardiac output is less in comparison to 28-32 weeks.