Which of the following is FALSE regarding a normal pregnancy?
**Core Concept**
During a normal pregnancy, the body undergoes significant physiological changes to accommodate the growing fetus. These changes involve various hormonal, cardiovascular, and respiratory adaptations to ensure a healthy pregnancy outcome.
**Why the Correct Answer is Right**
The correct answer is related to the normal physiology of pregnancy. In a normal pregnancy, the cardiac output increases by approximately 40-50% due to the increased blood volume and heart rate. This increase in cardiac output helps to meet the increased metabolic demands of the fetus and the mother. Additionally, the blood pressure in a normal pregnancy typically remains within the normal range or decreases slightly due to the vasodilatory effects of progesterone.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect as it contradicts the normal physiological changes that occur during pregnancy. The blood pressure in a normal pregnancy typically remains within the normal range or decreases slightly.
* **Option B:** This option is incorrect as it does not accurately describe the normal physiological changes that occur during pregnancy. The cardiac output does increase, but the blood pressure typically remains within the normal range or decreases slightly.
* **Option C:** This option is incorrect as it does not accurately describe the normal physiological changes that occur during pregnancy. The blood pressure in a normal pregnancy typically remains within the normal range or decreases slightly.
* **Option D:** This option is incorrect as it contradicts the normal physiological changes that occur during pregnancy. The cardiac output does increase, but the blood pressure typically remains within the normal range or decreases slightly.
**Clinical Pearl / High-Yield Fact**
It's essential to note that a significant increase in blood pressure, known as gestational hypertension, can occur in some pregnancies. This condition can lead to preeclampsia, a serious complication that requires prompt medical attention.
**Correct Answer: A. Blood pressure increases significantly.**