Vasa previa in singleton pregnancies: diagnosis and clinical management based on an international expert consensus.

Background: There are limited data to guide the diagnosis and management of vasa previa. Currently, what is known is largely based on case reports or series and cohort studies.

Objective: This study aimed to systematically collect and classify expert opinions and achieve consensus on the diagnosis and clinical management of vasa previa using focus group discussions and a Delphi technique.

Incidence and causes of perinatal death in prenatally diagnosed vasa previa: a systematic review and meta-analysis.

Objective: This study aimed to estimate the perinatal mortality associated with prenatally diagnosed vasa previa and to determine what proportion of those perinatal deaths are directly attributable to vasa previa.

Data Sources: The following databases have been searched from January 1, 1987, to January 1, 2023: PubMed, Scopus, Web of Science, and Embase.

Study Eligibility Criteria: Our study included all studies (cohort studies and case series or reports) that had patients in which a prenatal diagnosis of vasa previa was made.

Longitudinal assessment of spiral artery and intravillous arteriole blood flow and adverse pregnancy outcome.

Objective: Superb microvascular imaging (SMI) has been shown to improve visualization of small vessels by suppressing global motions while preserving low-flow components, such as the microvessels in the placenta. We sought to determine if SMI-aided visualization of flow velocity waveforms in the spiral arteries (SA) and intravillous fetal arterioles (IVA) could predict fetal growth restriction (FGR), gestational hypertension (GH) and/or pre-eclampsia (PE).

Methods: This was a prospective longitudinal study of singleton pregnancies without fetal anomaly, receiving prenatal care in one of two medical centers over a 5-year period.

Circulating Cell-Free DNA to Determine the Fetal RHD Status in All Three Trimesters of Pregnancy.

Objective: To estimate the accuracy of a new assay to determine the fetal RHD status using circulating cell-free DNA.

Methods: This was a prospective, observational study. Maternal blood samples were collected in each trimester of pregnancy in 520 nonalloimmunized RhD-negative patients.

Clinical significance of amniotic fluid sludge in twin pregnancies with a short cervical length.

Objective: The objective of the study was to determine the clinical significance of amniotic fluid (AF) sludge in twin pregnancies with a short cervix.

Study Design: We evaluated twin pregnancies with a short cervical length that had an ultrasound between 16 and 26 weeks (n = 78). Pregnancy outcomes in those with sludge (n = 27) and those without (n = 51) were compared.