What changes occur in a mother's blood volume during pregnancy?

What changes occur in a mother's blood volume during pregnancy?

• A. Blood volume decreases by 10-20%
• B. Blood volume stays the same
• C. Blood volume increases by 30-50%
• D. Blood volume increases by 20-30%

Answer: (C)

During pregnancy, a woman's blood volume undergoes significant changes to accommodate the needs of the developing fetus and prepare for childbirth. Specifically, there is an increase in blood volume of approximately 30-50%. This increase is primarily due to the expansion of plasma volume, which helps to improve uterine perfusion and provide sufficient oxygen and nutrients to both the mother and the fetus. This physiological adaptation also serves to prepare the mother's body for the blood loss that can occur during delivery. The increased blood volume aids in maintaining adequate blood pressure and circulation during this critical time. Consequently, an elevation in blood volume is essential for supporting fetal development and maternal health throughout pregnancy.

During pregnancy, a woman's blood volume undergoes significant changes to accommodate the needs of the developing fetus and prepare for childbirth. Specifically, there is an increase in blood volume of approximately 30-50%. This increase is primarily due to the expansion of plasma volume, which helps to improve uterine perfusion and provide sufficient oxygen and nutrients to both the mother and the fetus.

This physiological adaptation also serves to prepare the mother's body for the blood loss that can occur during delivery. The increased blood volume aids in maintaining adequate blood pressure and circulation during this critical time. Consequently, an elevation in blood volume is essential for supporting fetal development and maternal health throughout pregnancy.