All of the following changes may be observed in a normal pregnancy, EXCEPT:: (A) Increase in blood viscosity, (B) Fall in serum iron concentration, (C) Increase in serum iron binding capacity, (D) Increase in blood oxygen carrying capacity
Answer is A. During pregnancy there is a dispropoionate increase in plasma and RBC volume which produces a state of hemodilution during pregnancy. During pregnancy plasma volume increases upto 50%. RBC volume increases to the extend of 20-30%. The advantages of hemodilution are: Diminished blood viscosity ensures optimum gaseous exchange between the maternal and fetal circulation. Protection of mother against the adverse effects of blood loss during delivery. Ref: Textbook of Obstetrics By D.C. Dutta, 6th edition, Pages 51-55