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How accurate are ultrasounds in determining the size of a baby?
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Dating changes for smaller discrepancies are appropriate based on how early in the first trimester the ultrasound examination was performed and clinical assessment of the reliability of the LMP date Table 1. Get diet and wellness tips to help your kids stay healthy and happy. After that time, BPD at least 21 mm showed a similar error 7. Appropriately performed obstetric ultrasonography has been shown to accurately determine fetal gestational age 1. Accuracy of gestational age estimation by means of fetal crown—rump length measurement. The commonest indication for induction of labor in the two hospitals and in our environment is prolonged pregnancy. Ultrasound dating at 12—14 weeks of gestation. Computer assisted analysis of fetal age in the third trimester using multiple fetal growth parameters. Accordingly, in creating recommendations and the associated summary table, single-point cutoffs were chosen based on expert review. Estimation of gestational age by transvaginal sonographic measurement of greatest embryonic length in dated human embryos. The aim of this study was to determine the perception and acceptability of menstrual dating EDD derived from LMP for timing of labor induction for postdatism by pregnant women who have a late pregnancy ultrasound scan. Ultrasounds During Pregnancy During an ultrasound, a technician will spread a warm gel over the lower part of your abdomen and then press a tool called a transducer against your belly to examine your fetus using sound waves. Table 1 provides guidelines for estimating the due date based on ultrasonography and the LMP in pregnancy, and provides single-point cutoffs and ranges based on available evidence and expert opinion. Further details of the sociodemographic characteristics of the respondents are shown in Table 1. Dating scans are usually recommended if there is doubt about the validity of the last menstrual period.
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