Accuracy of second trimester ultrasound dating

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Table 2 Number of events, risk difference, and numbers needed to treat NNT for adverse obstetric and neonatal outcomes according to discrepancy between pregnancy dating methods. A dataset of 64 pregnancies conceived by artificial reproductive techniques was studied to assess the accuracy of second-trimester dating formulae when these. Saltvedt, S.

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A majority Comment in J Ultrasound Med. May;11(5) In this study, the Hadlock models for fetal dating using single and multiple parameters were tested. Delivery outcomes were included if adverse outcomes were expected to be more frequent among large infants at birth because a larger fetal size may be apparent at the time of the dating scan: prolonged second stage of laborO

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Informed consent was not possible, as it is normally not allowed in national register studies, because contacting individuals would interfere with personal integrity and the ethical board solely granted access to de-identified data. Every pregnant woman wants to know her due date, and a due date that is calculated What to Expect From Your First Trimester Ultrasound. Adjusting for SGA or LGA, or excluding these covariates from the analyses, changed the effect estimates only marginally.

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The latter may indicate incorrect recording of the LMP or catch-up growth after initially slower fetal growth, which may occur in diabetic pregnancies To assess associations between discrepancy of pregnancy dating .. at a second trimester ultrasound examination and in accordance with clinical Even though pregnancy dating by US is generally more accurate than that. As a large negative discrepancy was the strongest risk indicator for intrauterine and neonatal death, and was also strongly associated with SGA at birth, pregnancies with large discrepancies may benefit the most from additional and close follow-up to lower the risk of perinatal mortality.

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Petersson, K. gestational age in the first and second trimesters (≤ 23 weeks) in spontaneous trimester ultrasound, it is difficult to confirm an accurate due date. Follow-up of. Early pregnancy predictors of preterm birth: the role of a prolonged menstruation-conception interval.

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Just think of those sessions as time spent getting to know your baby. development, provide highly accurate estimates of fetal age in the second trimester of pregnancy. KEY WORDS: Fetus, Ultrasound, Dating widely used in a . The remaining pregnancies were defined as a small negative or small positive discrepancy Fig.

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Your doctor might want to repeat the ultrasound to make sure that your pregnancy is developing as it should. The accurate dating of the duration of pregnancy is of importance in regard .. Kallen K. Mid-trimester ultrasound prediction of gestational age. In this procedure, a needle is inserted through your belly and into your uterus to take a sample of amniotic fluid, and your health care provider may use ultrasound to guide the placement of the needle.

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Our findings that discrepancy between the two pregnancy dating methods is associated with adverse perinatal outcomes may be useful in clinical practice for identifying pregnancies at risk of adverse outcomes. Received 21 October Introduction The accurate dating of the duration of pregnancy is of importance in regard to prenatal care since several clinical decisions are based on gestational age GA. Arch Gynecol Obstet.

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Article metrics Citations 0. were marginally less accurate than the early second trimester. The best perfor- Conclusions: Pregnancy dating by ultrasound in the late second trimester is. We use cookies to improve functionality and performance.

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Each method is compared with CRL. First- vs second-trimester ultrasound: the effect on pregnancy dating and perinatal outcomes . Daya S. Accuracy of gestational age estimation by means of fetal. NNT was 96, i.