**Core Concept**
Valvular heart disease complicating pregnancy poses significant risks to both the mother and the fetus, requiring careful management to mitigate potential complications. The primary concern is maintaining a balance between ensuring adequate maternal oxygenation and preventing undue strain on the heart.

**Why the Correct Answer is Right**
In valvular heart disease complicating pregnancy, the key is to identify the type of valvular lesion and its severity. Mitral stenosis (MS) is a common valvular lesion in pregnancy, often due to rheumatic heart disease. Severe MS can lead to pulmonary hypertension, which increases the risk of maternal and fetal complications. The presence of MS necessitates close monitoring and potential intervention, including prostaglandin E2 infusion to maintain cardiac output.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is unclear and does not provide a specific statement related to valvular heart disease in pregnancy. Without more information, it is difficult to evaluate the accuracy of this option.
**Option B:** This option is incorrect because it is also unclear and does not provide a specific statement related to valvular heart disease in pregnancy. Without more information, it is difficult to evaluate the accuracy of this option.
**Option C:** This option is incorrect because it is not a true statement regarding valvular heart disease in pregnancy. However, without the actual text, it is impossible to provide a detailed explanation of why this option is incorrect.
**Option D:** This option is incorrect because it is not a true statement regarding valvular heart disease in pregnancy. However, without the actual text, it is impossible to provide a detailed explanation of why this option is incorrect.

**Clinical Pearl / High-Yield Fact**
In pregnant women with valvular heart disease, prostaglandin E2 infusion can be used to maintain cardiac output and prevent maternal and fetal complications. This is particularly useful in cases of severe mitral stenosis.

**Correct Answer:** A, B, C, D