How accurate are sonograms for dating pregnancy
"High-speed computers can reconstruct the internal structure of the target based on the speed and strength of this returned noise," he explains.
In essence, sound paints a picture of your baby, with a little help from digital technology and real-time measurements.
The gel helps improve contact between the probe and your skin. It involves scanning with the ultrasound probe lying in the vagina.
As the pregnancy progresses, establishing a due date and accurate fetal weights and measurements becomes more challenging, because when it comes to measurements, an ultrasound's range of error increases every week.In this case, the tech may attempt to get the baby to move, or will schedule you for a repeat ultrasound." You can also discover your baby's sex around week 20 (or a few weeks earlier).