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Other benefits of the 11–13+6 weeks scan include confirmation that the fetus is alive, accurate dating of the pregnancy, early diagnosis of major fetal abnormalities, and the detection of multiple pregnancies.
ultrasound scan. A routine mid-trimester fetal ultrasound examination includes an evaluation of the following: - cardiac activity; - fetal number (and chorionicity and amnionicity in cases of multiple pregnancy); - gestational age/fetal size; - basic fetal anatomy; - placental appearance and location; - amniotic fluid volume.
Fetal size charts are used to compare the size of a fetus (of known gestational age) with reference data and to compare the size of a fetus on two or more different occasions.
The presence of each bony segment of the upper and lower limbs and presence and normal orientation of the two hands and feet should be noted at the 11 to 13. + 6-week ultrasound scan. The terminal phalanges of the hands may be visible at 11 weeks, especially with transvaginal scanning (Figure 7a).
The ISUOG Guidelines on ultrasound assess-ment of fetal biometry and growth describe methodology, reference ranges, growth standards and quality-control processes for appropriate assessment of fetal biometry and diagnosis of fetal growth disorders6.
22 maj 2023 · This routine anatomy ultrasound is performed between 18 to 22 weeks in every pregnancy to assess fetal anatomy, screen for anomalies, evaluate the placental location and maternal pelvic anatomy, and estimate gestational age (if not performed with an earlier scan).
Methods: We examined 4,698 singleton pregnan-cies with ultrasound measurements of CRL, HR, GSD and YSD at 6–10 weeks and CRL at 11–13 weeks resulting in the live birth after 36 weeks of phenotypically normal neonates with birth weight above the 5th centile.
