How accurate is ultrasound dating at 12 weeks

how accurate is ultrasound dating at 12 weeks

Radiology ; A dating scan is an ultrasound examination which is performed in order to establish the gestational age of the pregnancy. By 6 to 7 weeks gestation the fetus is clearly seen on trans-vaginal ultrasound and the heart beat can be seen at this early stage 90 to beats per minute under 6 to 7 weeks, then to beats per minute as the baby matures. A consistent and exacting approach to accurate dating is also a research and public health imperative because of the influence of dating on investigational protocols and vital statistics.

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