Rethinking Prenatal Screening for Anomalies of Placental and Umbilical Cord Implantation.

Abstract:

:The most common anomalies of implantation of the placenta and umbilical cord include placenta previa, placenta accreta spectrum, and vasa previa, and are associated with considerable perinatal and maternal morbidity and mortality. There is moderate quality evidence that prenatal diagnosis of these conditions improves perinatal outcomes and the performance of ultrasound imaging in diagnosing them is considered excellent. The epidemiology of placenta previa is well known, and it is standard clinical practice to assess placental location at the routine screening second-trimester detailed fetal anatomy ultrasound examination. In contrast, the prevalence of placenta accreta spectrum and vasa previa in the general population is more difficult to evaluate because detailed confirmatory histopathologic data are not available in most studies. The sensitivity and specificity of ultrasonography for the diagnosis of these anomalies is also difficult to assess. Recent epidemiologic studies show an increase in the incidence of placental and umbilical cord implantation anomalies, which may be the result of increased use of assisted reproductive technology and cesarean delivery. There is good evidence to support targeted standardized protocols for women at high risk and that screening and diagnosing placenta accreta spectrum and vasa previa should be integrated into obstetric ultrasound training programs.

journal_name

Obstet Gynecol

authors

Jauniaux E,Silver RM

doi

10.1097/AOG.0000000000004175

subject

Has Abstract

pub_date

2020-12-01 00:00:00

pages

1211-1216

issue

6

eissn

0029-7844

issn

1873-233X

pii

00006250-202012000-00021

journal_volume

136

pub_type

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