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
[{'content': 'Maximal level of cardiac output is seen at: September 2009 \nSelect and explain. \nA. 22-26 weeks of pregnancy, B. 26-30 weeks of pregnancy, C. 30-34 weeks of pregnancy, D. 34-38 weeks of pregnancy', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C: 30-34 Weeks of Pregnancy The cardiac output stas to increase from 5th 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%) It returns to pre-pregnancy level by 4 weeks time after labour.', 'role': 'assistant'}]