They can start with a blood screening and ultrasound to access your risk for down syndrome first. If the risk is great enough the will then do an amnio test which is what your thinking of. It is a large needle that us to take a sample from your uterus but it isn't through the belly button. They use an ultrasound to decide the safest place to insert the needle. It is risky and can cause miscarriage which is why they do the screening first.
I got it done recently! So the doctor takes some mesurments of the fetus through the UZ, and i also did the blood test. Thankfully the results are great, and it wasnt painfull .... Waiting game ***** tho :)
Good luck to ya! :)
I was going to get tested for that blood test but my insurance wouldn't cover it most of the time the test come out postive it could say 1 out of so many hundreds or less and the less it get the more chance but it doesn't mean ur baby will have it plus ultrasounds can detect downsyndrome and cleft palate and cleft lip and other disorders so just be aware of that:).goodluck hope all is well
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