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KEY FACTS
Terminology
Imaging
Top Differential Diagnoses
Clinical Issues
Diagnostic Checklist
TERMINOLOGY
Abbreviations
- Placenta previa (PP)
- Low-lying placenta (LLP)
- Internal os of cervix (IO)
- Lower uterine segment (LUS)
- Transvaginal ultrasound (TVUS)
Definitions
- PP: Placenta covers IO
- LLP: Placenta edge is ≤ 2 cm from IO
- Normal: Placenta edge is > 2 cm from IO
- Previous classification with marginal and partial PP deemed confusing
IMAGING
Ultrasonographic Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Staging, Grading, & Classification
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Consider
Image Interpretation Pearls
Reporting Tips
Selected References
- Huang S et al: Maternal and neonatal outcomes of repeated antepartum bleeding in 493 placenta previa cases: a retrospective study. J Matern Fetal Neonatal Med. 1-6, 2021
- King LJ et al: Maternal risk factors associated with persistent placenta previa. Placenta. 99:189-92, 2020
- Durst JK et al: Resolution of a low-lying placenta and placenta previa diagnosed at the midtrimester anatomy scan. J Ultrasound Med. 37(8):2011-9, 2018
- Gibbins KJ et al: Placenta previa and maternal hemorrhagic morbidity. J Matern Fetal Neonatal Med. 31(4):494-9, 2018
- Fan D et al: Prevalence of antepartum hemorrhage in women with placenta previa: a systematic review and meta-analysis. Sci Rep. 7:40320, 2017
- Kollmann M et al: Placenta praevia: incidence, risk factors and outcome. J Matern Fetal Neonatal Med. 29(9):1395-8, 2016
- Silver RM: Abnormal placentation: placenta previa, vasa previa, and placenta accreta. Obstet Gynecol. 126(3):654-68, 2015
- Vintzileos AM et al: Using ultrasound in the clinical management of placental implantation abnormalities. Am J Obstet Gynecol. 213(4 Suppl):S70-7, 2015
- Quant HS et al: Transabdominal ultrasonography as a screening test for second-trimester placenta previa. Obstet Gynecol. 123(3):628-33, 2014
- Räisänen S et al: Placenta previa and the risk of delivering a small-for-gestational-age newborn. Obstet Gynecol. 124(2 Pt 1):285-91, 2014
- Reddy UM et al: Fetal imaging: executive summary of a joint Eunice Kennedy Shriver National Institute of Child Health and Human Development, Society for Maternal-Fetal Medicine, American Institute of Ultrasound in Medicine, American College of Obstetricians and Gynecologists, American College of Radiology, Society for Pediatric Radiology, and Society of Radiologists in Ultrasound Fetal Imaging Workshop. J Ultrasound Med. 33(5):745-57, 2014
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References
Tables
Tables
KEY FACTS
Terminology
Imaging
Top Differential Diagnoses
Clinical Issues
Diagnostic Checklist
TERMINOLOGY
Abbreviations
- Placenta previa (PP)
- Low-lying placenta (LLP)
- Internal os of cervix (IO)
- Lower uterine segment (LUS)
- Transvaginal ultrasound (TVUS)
Definitions
- PP: Placenta covers IO
- LLP: Placenta edge is ≤ 2 cm from IO
- Normal: Placenta edge is > 2 cm from IO
- Previous classification with marginal and partial PP deemed confusing
IMAGING
Ultrasonographic Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Staging, Grading, & Classification
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Consider
Image Interpretation Pearls
Reporting Tips
Selected References
- Huang S et al: Maternal and neonatal outcomes of repeated antepartum bleeding in 493 placenta previa cases: a retrospective study. J Matern Fetal Neonatal Med. 1-6, 2021
- King LJ et al: Maternal risk factors associated with persistent placenta previa. Placenta. 99:189-92, 2020
- Durst JK et al: Resolution of a low-lying placenta and placenta previa diagnosed at the midtrimester anatomy scan. J Ultrasound Med. 37(8):2011-9, 2018
- Gibbins KJ et al: Placenta previa and maternal hemorrhagic morbidity. J Matern Fetal Neonatal Med. 31(4):494-9, 2018
- Fan D et al: Prevalence of antepartum hemorrhage in women with placenta previa: a systematic review and meta-analysis. Sci Rep. 7:40320, 2017
- Kollmann M et al: Placenta praevia: incidence, risk factors and outcome. J Matern Fetal Neonatal Med. 29(9):1395-8, 2016
- Silver RM: Abnormal placentation: placenta previa, vasa previa, and placenta accreta. Obstet Gynecol. 126(3):654-68, 2015
- Vintzileos AM et al: Using ultrasound in the clinical management of placental implantation abnormalities. Am J Obstet Gynecol. 213(4 Suppl):S70-7, 2015
- Quant HS et al: Transabdominal ultrasonography as a screening test for second-trimester placenta previa. Obstet Gynecol. 123(3):628-33, 2014
- Räisänen S et al: Placenta previa and the risk of delivering a small-for-gestational-age newborn. Obstet Gynecol. 124(2 Pt 1):285-91, 2014
- Reddy UM et al: Fetal imaging: executive summary of a joint Eunice Kennedy Shriver National Institute of Child Health and Human Development, Society for Maternal-Fetal Medicine, American Institute of Ultrasound in Medicine, American College of Obstetricians and Gynecologists, American College of Radiology, Society for Pediatric Radiology, and Society of Radiologists in Ultrasound Fetal Imaging Workshop. J Ultrasound Med. 33(5):745-57, 2014
