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Detection of intrauterine growth retardation in twins using individualized growth assessment. II. Evaluation of third-trimester growth and prediction of growth outcome at birth

✍ Scribed by Russell L. Deter; Theodor Stefos; Ronald B. Harrist; Reba M. Hill

Publisher: John Wiley and Sons
Year: 1992
Tongue: English
Weight: 543 KB
Volume: 20
Category: Article
ISSN: 0091-2751
DOI: 10.1002/jcu.1870200903

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✦ Synopsis

Second-and third-trimester growth in 34 twin fetuses was evaluated with ultrasonography by measurement of five anatomic parameters. Rossavik growth models, derived from second-trimester measurements, were used to specify expected thirdtrimester growth curves. Actual measurements were compared to predicted measurements by calculation of the percent deviations. Growth outcome a t birth [normal, intrauterine growth retardation (IUGR)] was determined from Neonatal Growth Assessment Scores.

Growth in the second trimester was similar in normal and IUGR twins. In the third trimester, abnormal negative deviations were larger and more numerous in IUGR twins. However, there was considerable individual variability and normal twins also had abnormal negative deviations. In IUGR twins, the first appearance of an abnormal negative deviation was quite variable (range: 28.6 weeks to 35.1 weeks), as was the parameter to show such a deviation.

Prediction of neonatal outcome was poor using individual anatomic parameters but improved considerably with use of all five parameters. However, some fetuses were misclassified when only the number of abnormal negative deviations was used. The Prenatal Growth Assessment Score (PGAS), determined by both the number and magnitude of abnormal negative deviations, predicted neonatal outcomes with a sensitivity of 100% and specificity of 100%. On average, PGAS values were abnormal 5 weeks before delivery. These results indicate that normal and IUGR twins can be separated, using third-trimester growth patterns, if multiple parameter Individualized Fetal Growth Assessment is employed.

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