Measurements outside the normal range are not always significant, especially if the difference is minimal.Your baby will be carefully assessed if there are concerns about significant deviations from normal.A third trimester ultrasound is performed using transabdominal ultrasound.
The gel helps improve contact between the probe and your skin.
Your ultrasound is always performed in the context of your clinical history and the results of previous ultrasounds and investigations.
The third trimester ultrasound will commonly measure: Each measurement is compared to a normal reference range, which varies with gestation.
If urinary pregnancy test is negative similar findings may suggest submucosal fibroid or retained products of conception.
The earlier in pregnancy a scan is performed, the more accurate the age assignment from crown rump length.