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 : 
Select and explain. 
A. Plasma fibrinogen levels are increased, B. Fibrinogen levels are decreased, C. Thyroglobulins are decreased, D. IgD are markedly increased
A: Plasma fibrinogen levels are increased
Answer: A: Plasma fibrinogen levels are increased 
Explanation: Plasma fibrinogen levels are increased