Open AccessOn the evaluation of routine ultrasound screening in the third trimester for detection of light for gestational age (LGA) infants
Author(s) -
Secher N. J.,
Hansen P. Kern,
Lenstrup C.,
Eriksen P. Sindberg,
Thomsen Birthe Lykke,
Keiding N.
Publication year - 1987
Publication title -
acta obstetricia et gynecologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.401
H-Index - 102
eISSN - 1600-0412
pISSN - 0001-6349
DOI - 10.3109/00016348709022056
Subject(s) - medicine , gestational age , obstetrics , pregnancy , gestation , biparietal diameter , third trimester , birth weight , ultrasound , pediatrics , radiology , genetics , head circumference , biology
Based upon 2 194 consecutive pregnancies with known gestational age, formulas for weight deviation predicted in the 32nd and 37th gestational week were estimated by multiple linear regression on the measurements of the abdominal d iameter (AD) and the biparietal diameter (BPD) of the first 64% of the pregnancies. The usefulness of the screening was evaluated on the remaining 36%. An attempt to diagnose light for gestational age (LGA) infants resulted in either a low sensitivity or a low predictive value of a positive test. The late third trimester screening was more sensitive than the early, indicating LGA as a late phenomenon in pregnancy. Knowing the result from the late scanning, the result from the early scanning contributed almost no further information about whether the infant would be LGA at birth. Basic epidemiological characteristics of other comparable investigations on high‐risk pregnancies and non selected pregnancies are presented.