Ultrasound accuracy for dating

We ask that you to fill your bladder by drinking a pint of water before the scan.

Pregnancy dating is based on a pragmatic guideline incorporating information from the LMP, FH and early US (if available).17 The accuracy of this guideline and the clinical value of late US-based GA dating have not been assessed. Okland I, Gjessing HK, Grøttum P, Eggebø TM, Eik-Nes SH. two traditional sample-based models: validation on 9046 ultrasound examinations. Five dating methods: LMP, FH, US and their combinations, were assessed against the actual day of delivery (ADD).The main outcome measures were: (i) the days between the ADD and estimated date of delivery in pregnancies where spontaneous labour occurred and the baby had a normal birth weight; (ii) the incidence of gestational age-related outcomes; and (iii) the influence of clinical variables on dating discrepancies. The accuracy of dating was similar for certain and uncertain LMP. US-based dating was most accurate (for 85% of predictions within 14 days) and similarly accurate at 20 - 24 weeks and at Pregnancy dating by US, including those in more advanced pregnancies than currently permitted, is recommended since all non-ultrasound-based estimations of gestational age were considerably less accurate.Our aim was to determine the accuracy of the different dating methods, and of their combinations, since they are currently widely used in SA. Salomon LJ, Pizzi C, Gasparrini A, Bernard JP, Ville Y. Salomon LJ, Pizzi C, Gasparrini A, Bernard JP, Ville Y. Okland I, Gjessing HK, Grøttum P, Eggebø TM, Eik-Nes SH. two traditional sample-based models: validation on 9046 ultrasound examinations. We performed a prospective study that compared the current US policy with a policy that included a routine booking scan. Symphysis-fundus measurements in screening for small-for-dates infants: A community based study in Gloucestershire. Prediction of the date of delivery based on first trimester ultrasound measurements: An independent method from estimated date of conception. Prediction of the date of delivery based on first trimester ultrasound measurements: An independent method from estimated date of conception.