Dating scan accuracy
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Advanced Ultrasound – This exam is similar to the standard ultrasound, but the exam targets a suspected problem and uses more sophisticated equipment.Doppler Ultrasound – This imaging procedure measures slight changes in the frequency of the ultrasound waves as they bounce off moving objects, such as blood cells.
Standard Ultrasound – Traditional ultrasound exam which uses a transducer over the abdomen to generate 2-D images of the developing fetus.
The sound waves bounce off bones and tissue returning back to the transducer to generate black and white images of the fetus.
Ultrasounds may be performed at any point during pregnancy, and the results are seen immediately on a monitor during the procedure.
Heartbeats are best detected with transvaginal ultrasounds early in pregnancy.
Concern typically develops if there is no fetal heart activity in an embryo with a crown-rump length greater than 5mm.
It may also be possible to determine the gender of your baby during this ultrasound.
Several factors, such as the stage of pregnancy and position of the fetus, will influence the accuracy of the gender prediction.
An ultrasound exam is a procedure that uses high-frequency sound waves to scan a woman’s abdomen and pelvic cavity, creating a picture (sonogram) of the baby and placenta.
Although the terms ultrasound and sonogram are technically different, they are used interchangeably and reference the same exam.
Because ultrasound should only be used when medically indicated, many healthy pregnancies will not require an ultrasound.
The average number of ultrasounds varies with each healthcare provider.
Fetal Echocardiography – Uses ultrasound waves to assess the baby’s heart anatomy and function.