**Question:** Expectant management of placenta previa includes all except

A. bed rest
B. hydration
C. blood transfusion
D. uterine artery embolization

**Core Concept:**
Placenta previa is a condition where the placenta is located low in the uterus and partially or completely covers the internal cervical os. This may lead to heavy bleeding during labor due to the placental tissue obstructing uterine hemorrhage control. Expectant management refers to monitoring the patient closely and intervening when active treatment is necessary.

**Why the Correct Answer is Right:**
Option D, uterine artery embolization, is an invasive procedure that involves blocking blood flow to the uterus to reduce uterine contractions and bleeding. This is not considered part of expectant management for placenta previa, as it is an active treatment method that may be required at a later stage when the condition worsens.

**Why Each Wrong Option is Incorrect:**
A. Bed rest is a part of general management for bleeding disorders and can be beneficial in controlling bleeding. However, it does not specifically address the issue of placenta previa.

B. Hydration is essential for maintaining blood volume and preventing dehydration, but it is not a specific treatment for placenta previa.

C. Blood transfusion is a life-saving measure for severe anemia due to massive bleeding, but it is not a primary management strategy for placenta previa.

**Clinical Pearl:**
In the management of placenta previa, expectant management typically involves:

1. Close monitoring of maternal hemodynamics, with blood transfusion and uterine artery embolization as last resort options.
2. Prophylactic administration of uterotonic agents to prepare the cervix for dilatation and delivery.
3. Close monitoring of fetal wellbeing with regular ultrasound scans.
4. Provision of adequate pain relief and psychological support to the patient.

In summary, expectant management aims to prevent active treatment until the patient's condition worsens and active treatment is necessary, such as uterine artery embolization or blood transfusion.