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: Physiology
[{'content': 'Which of the following changes are not likely during pregnancy? \nSelect and explain. \nA. A reduction in platelet concentration to the lower end of normal value, B. Increase in the white cell count, C. Increase in the levels of factor VII, VIII & X, D. Decrease in vital capacity', 'role': 'user'}, {'content': "Answer: D \nExplanation: The vital capacity doesn't change in pregnancy, its the tidal volume that expands into the ERV & IRV. The levels of factor VII ,VIII & X is usually at least double the non-pregnant state. The increase in WBC and ESR during pregnancy causes difficulty in diagnosing infections as well.", 'role': 'assistant'}]