A 32-year-old primigravida at 34 weeks of gestation presents to the emergency department with painless vaginal bleeding of 200 mL. She denies abdominal pain, contractions, or leakage of fluid. Vital signs are stable (BP 128/82 mmHg, HR 88 bpm). On speculum examination, blood is seen pooling in the vagina with no cervical lesions. Transabdominal ultrasound confirms a low-lying placenta with the lower edge 1.5 cm from the internal cervical os. She has no prior uterine surgery or curettage. What is the most appropriate immediate management?

Explanation

## Clinical Scenario Analysis This is a **stable, hemodynamically normal patient at 34 weeks with painless vaginal bleeding and ultrasound-confirmed placenta previa** (lower edge 1.5 cm from internal os = major previa). ## Management of Placenta Previa by Gestational Age & Stability | Gestational Age | Bleeding Status | Management | |---|---|---| | < 37 weeks | Stable, mild–moderate bleed | Expectant (admit, pelvic rest, corticosteroids, cross-matched blood available) | | < 37 weeks | Massive bleed or unstable | Cesarean delivery | | ≥ 37 weeks | Any bleeding | Cesarean delivery (planned or urgent) | **Key Point:** At 34 weeks with stable vitals and first-episode bleeding, **expectant management is standard**. The goal is to reach 37 weeks (fetal maturity) while avoiding maternal hemorrhage. ## Why Expectant Management Here? 1. **Gestational age 34 weeks** — preterm delivery carries significant neonatal morbidity; prolonging pregnancy is beneficial if mother remains stable. 2. **Hemodynamic stability** — BP normal, HR normal, modest blood loss (200 mL). 3. **No contraindications** — no signs of placental abruption (no pain), no fetal distress. 4. **Standard protocol** — antenatal corticosteroids (betamethasone) reduce neonatal respiratory distress syndrome by ~50% [cite:ACOG Practice Bulletin 146]. **Clinical Pearl:** Most women with placenta previa have their first bleed in the third trimester and can be managed expectantly as outpatients or inpatients depending on local resources and patient compliance. ## Admission Requirements - Strict pelvic rest (no intercourse, no vaginal examination unless in labor or massive hemorrhage). - Corticosteroids for fetal lung maturity (betamethasone 12 mg IM × 2 doses, 24 hours apart). - IV access, cross-matched blood on standby. - Fetal heart rate monitoring. - Plan for cesarean delivery at 37 weeks or if recurrent/massive bleeding occurs. **High-Yield:** The **absence of pain** and **stable hemodynamics** rule out abruption and shock — both would mandate urgent delivery. Painless bleeding = previa until proven otherwise.