Just completed my first trimester testing ultrasound and bloodwork. It will take about a week for me to formally get the results from my doctor, but I got a peak at some of the ultrasound numbers.

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Does anyone know how I can calculate the odds of Down Syndrome? Any feedback on the numbers I should look out for?

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Age: 31

Weight: 280

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Gestational Age: 12+4

Crown to Rump: 6.4cm (64mm)

Bi Parietal Diameter: 2.1cm (21mm)

Nuchal Translucency: 1.6mm

Heart Rate: 180

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Really appreciate your help!