First trimester ultrasound screening is effective in reducing postterm labor induction rates: A randomized controlled trial

Bennett, Kelly; Crane, Joan; O’Shea, P.G.; Lacelle, J.; Hutchens, Donna; Copel, Joshua A.

doi:10.1016/j.ajog.2003.09.065

Cited by 195 publications

(77 citation statements)

References 13 publications

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“…Since these errors are proportionally more important at the extremes of the distribution, their reduction also contributes to a decrease in births recorded as postterm. Randomised trials and observational studies both report that the use of early ultrasound dating reduces induction for postterm and the proportion of births that occur at 42 weeks and after, 22,23 although one trial found no such difference. 24 Other differences in the way that gestational age is determined, such as rounding up instead of using completed weeks 25 or the use of different ultrasound curves, 26 may also affect estimates.…”

Section: Discussionmentioning

confidence: 99%

“…In the group assigned to a second trimester scan, a 10-day rule was used and resulted in adjusting 11% of estimates. 22 A Swedish study on practices before the universal adoption of ultrasound found that 31% of women receiving care in hospitals offering routine ultrasound dating had their EDC adjusted, with interhospital differences of 18 to 65%. 27 A more recent randomised study, however, only found that 5.7% of women receiving a scan between 8 and 12 weeks had their dates readjusted with a 5-day decision rule.…”

Section: Discussionmentioning

confidence: 99%

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Variation in rates of postterm birth in Europe: reality or artefact?

Zeitlin

Blondel

Alexander

et al. 2007

BJOG

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Objective To compare rates of postterm birth in Europe.Design Analysis of data from vital statistics, birth registers, and national birth samples collected for the PERISTAT project.Setting Thirteen European countries.Population All live births or representative samples of births for the year 2000 or most recent year available.Methods Comparison of national and regional rates of postterm birth. Other indicators (birthweight, deliveries with a non-spontaneous onset and mortality) were used to assess the validity of postterm rates.Main outcome measures The proportion of births at 42 completed weeks of gestation or later.Results Postterm rates varied greatly, from 0.4% (Austria, Belgium) to over 7% (Denmark, Sweden) of births. Higher postterm rates were associated with a greater proportion of babies with birthweight 4500 g or more. Fetal and early neonatal mortality rates were higher among postterm births than among births at 40 weeks. Countries with higher proportions of births with a nonspontaneous onset of labour had lower postterm birth rates. The shapes of the gestational-age distributions at term varied. In some countries, there was a sharp cutoff in deliveries at 40 weeks, while elsewhere this occurred at 41 weeks.Conclusions These results suggest that practices for managing pregnancies continuing beyond term differ in Europe and raise questions about the health and other impacts in countries with markedly high or low postterm rates. Some variability in these rates may also be due to methods for determining gestational age, which has broader implications for international comparisons of gestational age, including rates of postterm and preterm births and small-for-gestational-age newborns.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Variation in rates of postterm birth in Europe: reality or artefact?

Zeitlin

Blondel

Alexander

et al. 2007

BJOG

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“…However, 215 there is no data on individual pregnancy dating. This could have 216 contributed to an increase in our estimated risk on postterm 217 pregnancy [25].…”

mentioning

confidence: 95%

Recurrence rate and outcome of postterm pregnancy, a national cohort study

Kortekaas

Kazemier

Ravelli

et al. 2015

European Journal of Obstetrics & Gynecology and Reproductiv

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“…NIPS does not replace the utility of a first-trimester ultrasound examination, which has been proven to be useful for accurate gestational dating, assessment of the nuchal translucency region to identify a fetus at increased risk for a chromosome abnormality, identification of twins and higher-order pregnancies, placental abnormalities, and congenital anomalies. [16][17][18][19] 9. Limited data are currently available on the use of NIPS in twins and higher-order pregnancies.…”

Section: 12mentioning

confidence: 99%

ACMG statement on noninvasive prenatal screening for fetal aneuploidy

Gregg

Gross

Best

et al. 2013

Genetics in Medicine

242

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The American College of Medical Genetics and Genomics (ACMG) believes that the application of genetic technology, particularly when used in the prenatal setting, needs to be supported by prospective clinical trials and considered carefully before its incorporation into routine clinical care. The ACMG has previously published guidelines on prenatal screening for Down syndrome, which have successfully assisted health-care providers and their patients during pregnancy. 1One of the major breakthroughs in obstetrical care was the advent of prenatal genetic diagnosis, initially by amniocentesis in the second trimester of pregnancy. Subsequently, chorionic villus sampling during the first trimester allowed for earlier diagnosis and management. However, the potential risk of fetal loss secondary to an invasive procedure has driven the search for noninvasive approaches for genetic screening and diagnosis. Until recently, noninvasive screening for aneuploidy relied on either the measurement of maternal serum analytes and/or ultrasonography with positive screen rates of ~5% and detection rates of 50-95%, depending on the screening strategy utilized. More recent advances in genomics and genomic technologies have resulted in the development of a noninvasive prenatal screening (NIPS) test using cell-free fetal DNA sequences isolated from a maternal blood sample.2-6 About 10% of DNA in maternal serum is of fetal origin; 4,7,8 this has been used for prenatal Rh determination and gender identification. Using nextgeneration sequencing platforms, millions of amplified genetic fragments can be sequenced in parallel (massively parallel sequencing). Platforms differ according to whether amplified regions throughout the genome, chromosome-specific regions, or single-nucleotide polymorphisms are the targets for sequencing. Furthermore, by using powerful bioinformatics tools, differences between maternal and fetal sequences and dosage differences in identical sequences or a reference chromosome can be determined and used for noninvasive screening for fetal aneuploidy. 9,10 Although studies are promising and demonstrate high sensitivity and specificity with low false-positive rates, there are limitations to NIPS. Specificity and sensitivity are not uniform for Noninvasive assessment of the fetal genome is now possible using next-generation sequencing technologies. The isolation of fetal DNA fragments from maternal circulation in sufficient quantity and sizes, together with proprietary bioinformatics tools, now allows patients the option of noninvasive fetal aneuploidy screening. However, obstetric care providers must become familiar with the advantages and disadvantages of the utilization of this approach as analysis of cell-free fetal DNA moves into clinical practice. Once informed, clinicians can provide efficient pretest and posttest counseling with the goal of avoiding patient harm. It is in the public's best interest that test results contain key elements and that laboratories adhere to established quality control and proficiency te...

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First trimester ultrasound screening is effective in reducing postterm labor induction rates: A randomized controlled trial

Cited by 195 publications

References 13 publications

Variation in rates of postterm birth in Europe: reality or artefact?

Variation in rates of postterm birth in Europe: reality or artefact?

Recurrence rate and outcome of postterm pregnancy, a national cohort study

ACMG statement on noninvasive prenatal screening for fetal aneuploidy

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