**Question:** All of the following may be used in pregnancy-associated hypertension, EXCEPT:

A. Angiotensin-Converting Enzyme (ACE) inhibitors
B. Angiotensin II receptor blockers (ARBs)
C. Calcium channel blockers
D. Beta-blockers

**Core Concept:**
Pregnancy-associated hypertension, also known as preeclampsia, is a complex and potentially life-threatening complication of pregnancy characterized by high blood pressure and proteinuria. Treatment involves managing hypertension and preventing complications. The correct pharmacological options for managing hypertension in pregnancy should be safe for both the mother and the fetus.

**Why the Correct Answer is Right:**
In pregnancy, it is crucial to choose medications that are safe for both the mother and the fetus. ACE inhibitors and ARBs inhibit the renin-angiotensin-aldosterone system (RAAS) pathway, which may cause detrimental effects on fetal development. Beta-blockers are contraindicated due to their potential to cause fetal bradycardia and respiratory distress.

**Why Each Wrong Option is Incorrect:**
A. ACE inhibitors (e.g., lisinopril) and ARBs (e.g., losartan) are contraindicated in pregnancy due to their potential to cause detrimental effects on fetal development, including growth restriction and pulmonary hypoplasia.
B. Beta-blockers (e.g., propranolol) are generally contraindicated in pregnancy as they can lead to fetal bradycardia and respiratory distress.
C. Calcium channel blockers (e.g., nifedipine) are generally considered safe in pregnancy and are often used for the management of hypertension in pregnancy, as they have minimal impact on fetal development.

**Correct Answer:** D. Beta-blockers (e.g., propranolol) are contraindicated in pregnancy due to their potential to cause detrimental effects on fetal development.

**Clinical Pearl:**
When managing hypertension in pregnancy, calcium channel blockers, such as nifedipine, are a safe and effective option due to their minimal impact on fetal development. ACE inhibitors, ARBs, and beta-blockers should be avoided or used with caution, as they can lead to adverse effects in the mother and fetus.