Bpd ultrasound dating
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Beyond this period, a variety of sonographic parameters, such as biparietal diameter, abdominal circumference, and femoral diaphysis length, can be used to estimate gestational age.
The variability of gestational age estimations, however, increases with advancing pregnancy.
Fetal growth retardation or macrosomia may be missed or incorrectly diagnosed owing to errors in gestational age assignment.
Interpretation of antenatal biophysical testing (non-stress tests and biophysical profiles) may be subject to variation with gestational age as well.
The articles assist in the understanding of the anatomy involved in treating specific conditions and performing procedures.If you have an ultrasound examination in your doctor's office, or with a radiologist, or other physician, the following are the minimum guidelines that should be met.These guidelines have been published not only by the This the most accurate means for sonographic dating of pregnancy.Measurements in the beam axis are more accurate than those made across the axis. Crown-Rump Length (CRL) and femur length) should be measured across the axis.The earliest measurement of gestational age taken in pregnancy should usually be accepted as the definitive assessment, subsequent examinations reflecting only fetal growth in the intervening period.