Jazz2:
I didn't take up any of the Down syndrome test. I only did a routine blood test to chk for anemia etc, and at 7th mth a diabetic glucose tolerance test.
We were briefed through by Dr Ong on the Down Syndrome tests.. for my age (31.. the risk is about 0.125% or 1 in 800), moreover the NT scan and the blood test or combi only tells if you are in a high risk/low risk group. Even if you are in the high risk group, doesn't mean the baby is having Down, just that the risk is higher - that's all .. to be sure, will need an amnio which again carries a 0.5-1% risk of miscarriage.
My decision all boils down to - what will you do with the final information available.e.g will you carry on with the pregnancy or choose to terminate it?. For me and hubby, we feel that every child is a blessing and have a fate of its own, thus we decided not to do the test(not to mention we did not want to go thru the anxiety for waiting for test results etc ... just to relate, my friend tested +ve, went on to do the amnio. End results was that her baby was completely fine. but the waiting window after the NT scan and before the amnio, and for amnio results thereafter were torturing)
What I said above is based on my own judgement. For me I would love to treat my own as an unique and would love to have it as carefree/ stressfree as possible.
If you are wondering then perhaps the best question to ask yourself is, what are you going to do with the information(test results)that's available to you:
1) if the NT or combi test is +ve, will you want to pursue to amniocentesis? are you comfortable with the risk of 0.5-1% of miscarriage to carry on with amnio (bearing in mind the baby might just be perfectly normal at the end of the day)
2)if you proceed and touchwood..in rare cases that if your baby is confirmed of having Down, will you and hubby wanna continue with the pregnancy (if yes, the knowledge of the test result might give you about 6 mths headstart to prepare mentally - join support groups, get more infor etc, but on the other hand it can also be a torturing remainder 6 mth of your pregnancy) and (if n0, then you will have to look into alternative of terminating the pregnancy - and in this case will have to seek 2nd opinion/look for other gynae as Dr. Ong doesn't perform abortions)
pretty long explaination.. but I hope it helps to clear off some of your doubts =)