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
In pregnancy all occurs except: 
Select and explain. 
A. Increased cardiac output, B. Decreased blood volume, C. Increased MCV, D. Increased glomerular flow
B: Decreased blood volume
Answer: B: Decreased blood volume 
Explanation: Decreased blood volume