This should include at least two fetal measurements usually biparietal diameter BPD and femur length FL plus a consideration of additional parameters such as head circumference HC , occipitofrontal diameter OFD , abdominal circumference AC and humerus length HL. Measurements in the beam axis are more accurate than those made across the axis. Despite this, some measurements e. 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.
How accurate are dating ultrasounds at 6 weeks? - Pregnancy and Parenting: Multiples - MedHelp
As it turns out, most women only need a couple of ultrasounds during pregnancy. Read on to learn more about these important prenatal exams. Pregnancy ultrasounds provide your doctor with plenty of valuable information. The results allow him to monitor your baby's growth, detect abnormalities, predict your due date , determine whether you're carrying multiples, see the position of your placenta, and make out the sex of your baby. But how many ultrasounds are safe during pregnancy, and when should you schedule the exams?
Pregnancy: What to Expect from an Early Scan (6 Weeks)
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