| A sterile speculum examination can be performed safely before ultrasonographic evaluation of placental localization, but a digital examination should be avoided until placenta previa is excluded by ultrasonography. | C | 1 |
| Women with bleeding in late pregnancy who are Rh negative should receive Rho(D) immune globulin (Rhogam) after performance of a Kleihauer-Betke test to determine the appropriate dose. | C | 2 |
| Placenta previa is a common incidental finding on second trimester ultrasonography and should be confirmed in the third trimester. | A | 6 |
| Corticosteroids should be administered to women who have bleeding from placenta previa at 24 to 34 weeks' gestation. | A | 18 |
| Outpatient management of placenta previa is appropriate in selected patients who do not have active bleeding and who can rapidly access a hospital with operative labor and delivery services. | A | 19, 20 |
| Magnetic resonance imaging of the pelvis may help confirm a diagnosis of invasive placenta and identify organ involvement associated with placenta percreta. | C | 28 |
| Treatment of preeclampsia with magnesium sulfate decreases the risk of placental abruption and improves maternal outcomes. | A | 38 |