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Neither nor any other party involved in the preparation or publication of this site shall be liable for any special, consequential, or exemplary damages resulting in whole or part from any user's use of or reliance upon this material. al., Evaluating the thresholds of abnormal second trimester multiple marker screening tests associated with intra-uterine growth restriction.
We cannot therefore recommended any change of current practice. Hadlock FP, et al., In utero analysis of fetal growth: a sonographic weight standard.
Large for gestational age (LGA) is generally used to describe a birth weight equal to or greater than the 90th percentile for a given gestational age .
However, there is not universal agreement on these definitions , and some have proposed the 15th and 97th percentiles as more optimal cut-offs to define SGA and LGA respectively .
TABLE 2 70% of infants born below the 10th percentile are not at risk for adverse outcomes . American College of Obstetricians and Gynecologists.
The difference in size between babies is most often due to constitutional causes such as the size of the baby's parents, ethnic background , or the sex of the baby .
ACOG advises newborns whose birth weight is less than the 10th percentile for gestational age are considered small for gestational age (SGA) .
Whereas a fetus with a weight that is less than the 10th percentile for its gestational age is considered to have fetal growth restriction (FGR), also known as intrauterine growth restriction (IUGR) [5, 7]. A classification system for selective intrauterine growth restriction in monochorionic pregnancies according to umbilical artery Doppler flow in the smaller twin. The SFH is measured using a tape placed over the mother's abdomen. Duryea EL,et al., A revised birth weight reference for the United States. 2014 Jul;124(1):16-22.doi:10.1097/AOG.0000000000000345. The mother's bladder should be empty when the measurement is done. A measurement discrepancy of more 3 cm is suggestive of a fetus with growth problems , an abnormal amniotic fluid level , a transverse lie, a twin pregnancy, or uterine fibroids [1,7]. The sensitivity of SFH measurement for detecting abnormal intrauterine growth was less than 35% in one study . found that the sensitivity of SFH measurement for detecting fetal growth abnormalities could be improved by serial plotting of the SFH on customized charts . Further trials are needed."  When there are factors that increase the risk for intrauterine growth restriction (IUGR) or the SFH is unreliable because of maternal obesity, twin pregnancy, polyhydramnios, or the presence of uterine leiomyomas (fibroids) ultrasonography may be a better screening modality for growth problems in the fetus.