## **Core Concept**
The expectant management of a patient with placenta previa involves careful monitoring and conservative measures to prevent or manage potential complications, particularly bleeding. Placenta previa is a condition where the placenta partially or completely covers the internal cervical os, leading to painless vaginal bleeding.

## **Why the Correct Answer is Right**
The correct approach for expectant management includes **bed rest**, close monitoring of the patient for any signs of further bleeding, and readiness for immediate intervention if necessary. This approach aims to reduce the risk of severe bleeding and allow for fetal maturity to increase if possible.

## **Why Each Wrong Option is Incorrect**
- **Option A:** Immediate delivery is usually considered if there's severe bleeding or if the patient is at term. For a 32-week pregnant woman, immediate delivery might not be necessary unless there's significant maternal or fetal distress.
- **Option B:** Administering corticosteroids for fetal lung maturity might be considered but does not directly address the management of placenta previa itself. It might be part of the overall management plan but isn't the primary expectant management strategy.
- **Option C:** While ultrasound monitoring is crucial, the question seems to be asking for a more comprehensive management approach rather than just a diagnostic tool.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that **bed rest** is a traditional component of expectant management for placenta previa, although its benefit is debated and might not be universally recommended. The goal is to minimize activity to reduce the risk of bleeding.

## **Correct Answer:** . Bed rest.