SynthesisPloS one2017
The Incidence of Postpartum Hemorrhage in Pregnant Women with Placenta Previa: A Systematic Review and Meta-Analysis.
Synthesis in PloS one, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 43 papers, 2 of them syntheses that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
43 citing papers in PubMed, 2 syntheses or guidelines pooled it, 107 citations in OpenAlex.
- Effect of Intrahepatic Cholestasis of Pregnancy on Neonatal Birth Weight: A Meta-Analysis.Journal of clinical research in pediatric endocrinology · 2018Pooled it
- Prevalence of abnormally invasive placenta among deliveries in mainland China: A PRISMA-compliant Systematic Review and Meta-analysis.Medicine · 2017Pooled it
- Low-lying placenta is associated with increased risk of hemorrhage and severe maternal morbidity: A nationwide analysis.Pregnancy (Hoboken, N.J.) · 2026Article
- Risk factors for postpartum hemorrhage after pregnancy termination for fetal malformations: a retrospective study and internally validated prediction model.Archives of gynecology and obstetrics · 2026Article
- Delivery outcomes associated with resolved first-trimester low placentation.Pregnancy (Hoboken, N.J.) · 2026Article
- Suturing the placental bed in addition to intrauterine balloon tamponade, is it effective in placenta previa patients?BMC pregnancy and childbirth · 2026Article
- Clinical Characteristics, Maternal and Neonatal Outcomes in Women with Placenta Previa Compared with Breech Cesarean Controls: A Retrospective Case-Control Study from a Single Tertiary Center in Lithuania.Medicina (Kaunas, Lithuania) · 2026Article
- Predictors of Postpartum Hemorrhage Following Repeat Cesarean Section: A Retrospective Cohort Study.Cureus · 2026Article
- Efficacy and cost-effectiveness of intraoperative cell salvage for patients with placenta previa during cesarean section: a retrospective comparison analysis.Open medicine (Warsaw, Poland) · 2026Article
- Risk Factors and Postpartum Hemorrhage among Women with Vaginal Delivery.Annals of African medicine · 2026Observational
- Risk of placenta previa in assisted reproductive technology: A Nordic population study with sibling analyses.PLoS medicine · 2025Article
- Global burden, disparities, and determinants of postpartum haemorrhage among women who gave birth: an umbrella review of systematic reviews and meta-analyses.Frontiers in reproductive health · 2025Review
- Perinatal factors for antepartum hemorrhage in women with placenta accreta spectrum.Frontiers in surgery · 2025Article
- Construction of a predictive model for the risk of postpartum hemorrhage in women with advanced maternal age undergoing natural childbirth.American journal of translational research · 2025Article
- Article
- Comparison of obstetric, neonatal, and surgical outcomes of emergency and planned deliveries in pregnancies complicated by placenta previa and in subgroups with and without placenta accreta spectrum.Turkish journal of obstetrics and gynecology · 2024Article
- Risk factors of severe postpartum hemorrhage in pregnant women with placenta previa or low-lying placenta: a retrospective cohort study.BMC pregnancy and childbirth · 2024Article
- Postpartum hemorrhage in electronic health records: risk factors at admission and in-hospital occurrence.Revista brasileira de ginecologia e obstetricia : revista da Federacao Brasileira das Sociedades de Ginecologia e Obstetricia · 2024Article
- Article
- Current Evidence on Vasa Previa without Velamentous Cord Insertion or Placental Morphological Anomalies (Type III Vasa Previa): Systematic Review and Meta-Analysis.Biomedicines · 2023Review
Corrections and comments
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Authors and funding
9 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThe global burden of postpartum hemorrhage (PPH) in women with placenta previa is a major public health concern. Although there are different reports on the incidence of PPH in different countries, to date, no research has reviewed them.
objectiveThe aim of this study was to calculate the average point incidence of PPH in women with placenta previa.
methodsA systematic review and meta-analysis of observational studies estimating PPH in women with placenta previa was conducted through literature searches in four databases in Jul 2016. This study was totally conducted according to the MOOSE guidelines and in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses standard.
resultsFrom 1148 obtained studies, 11 included in the meta-analysis, which involved 5146 unique pregnant women with placenta previa. The overall pooled incidence of PPH was 22.3% (95% CI 15.8-28.7%). In the subgroup, the prevalence was 27.4% in placenta previas, and was 14.5% in low-lying placenta previa; the highest prevalence was estimated in Northern America (26.3%, 95%CI 11.0-41.6%), followed by the Asia (20.7%, 95%CI 12.8-28.6%), Australia (19.2%, 95% CI 17.2-21.1%) and Europe (17.8%, 95% CI, 11.5%-24.0%).
conclusionsThe summary estimate of the incidence of PPH among women with placenta previa was considerable in this systematic review. The results will be crucial in prevention, treatment, and identification of PPH among pregnant women with placenta previa and will be contributed to the planning and implantation of relevant public health strategies.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.