American Journal of Obstetrics and Gynecology
Expert reviewObstetricsPlacental implantation abnormalities and risk of preterm delivery: a systematic review and metaanalysis
Section snippets
Materials and methods
We followed the Preferred Reporting Items for Systematic Reviews and Meta-Analysis statement guidelines for undertaking the systematic review and metaanalysis.11
Study selection and characteristics
In all, 79 studies were reviewed that met the above-mentioned inclusion criteria and for which information on the incidence of PIA and its association with gestational age at birth or preterm delivery were available (Figure 1). In all, 56 studies8, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66 were descriptive and did not
Comment
Preterm delivery remains a major contributor to short- and long-term morbidity and mortality both to the mother and her newborn.93 In the United States, approximately 60% of preterm deliveries are spontaneous and 40% are indicated.94, 95 We have previously identified that 5.6% of indicated preterm births at <35 weeks’ gestation were related to placenta previa and an additional 3.1% were related to “unexplained bleeding.”10 Since placental abruption was a separate category in that data set, it
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Ultrasonographic cervical length assessment in pregnancies with placenta previa and risk of perinatal adverse outcomes: a systematic review and meta-analysis
2024, American Journal of Obstetrics and Gynecology MFMGestation of delivery in people with antepartum hemorrhage and placenta previa
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2023, American Journal of Obstetrics and Gynecology MFMCitation Excerpt :In another post hoc analysis excluding vasa previa cases, we found similar associations of isolated VCI with SGA, PIH, and stillbirth. Compared with previous meta-analyses, we used stricter inclusion criteria by incorporating only studies with a control group of singleton pregnancies with CCI, whereas previous meta-analyses included non-VCI pregnancies in general, thus allowing cases with marginal cord insertion in the control group.11,28,29 Moreover, despite our stricter criteria, we managed to include more studies and a larger sample.11,28,29
Ultrasound diagnosis of placental and umbilical cord anomalies in singleton pregnancies resulting from in-vitro fertilization
2023, PlacentaCitation Excerpt :Uncomplicated term ART pregnancies have a higher risk of operative delivery, retained placenta and PPH [14]. IVF has also been associated with the subsequent development of accreta placentation, but the association is indirect and mainly due to the increase rate of low placentation following embryo transfer [18,19,35]. Heterogeneity in results is due to variation in the ultrasound criteria used for the diagnosis of placenta previa and the lack of detailed confirmation of the accreta grade at birth [36].
The authors report no conflict of interest.