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PubMed1997

The antenatal diagnosis of fetal abnormalities: a 10 year audit of influencing factors.

During the 10 years 1984-1993, a total of 438 fetuses and children with a congenital abnormality, identified antenatally or in the first year of life, were registered from the North Tees Health District with the Northern Region Congenital Abnormality Survey (NorCAS). This represented an abnormality rate of 2% of all births. In total, 252 structural abnormalities (57.5%) were detected by antenatal ultrasound examination. In spite of a targeted education programme, identification of cardiac lesions remained poor. The detection of structural abnormality by antenatal scan rose from 52% in 1984 to 85% in 1993, due mainly to improvements in image quality and resolution of ultrasound equipment. Also important was audit, based both on review of images and feedback from a comprehensive central register (NorCAS).

Congenital Abnormalities↗
PubMed1993

Frequency of fetal anomalies in sonographically detected polyhydramnios.

One hundred and five patients who met the criterion of having an amniotic fluid pocket depth greater than 8.0 cm were categorized as polyhydramniotic. Of these cases, 82% were singleton pregnancies and 18% were twin pregnancies. The degree of polyhydramnios correlated directly with the probability that an anomaly would be detected. For the lowest rank group (pocket depth of 8 to 9.5 cm), 50% of fetuses manifested an anomaly, whereas the highest rank (16.0 cm or greater pocket depth) carried an 88% risk for an anomaly. Overall, 63% of pregnancies with polyhydramnios revealed anomalies. Sonography found all to be anomalous. There were three false diagnoses of potential anomalies. Monochorionic anomalies of twinning (twin transfusion syndrome and acardiac twin) and gastrointestinal anomalies among singletons were the most commonly seen abnormalities. However, a broad spectrum of anomalies was represented in the study group. Only five diabetic mothers were seen in our study cohort, and in each of them the pregnancy was further complicated by an associated fetal anomaly.

Brain↗