Hi doc i was told my child has an intermediate risk of him/her being born with ds, just want to know what are my chances of him/her not having this condition and is there anything i can do to prevent such a condition as i'm still pregnant?

Screening options: Screening tests identify people at higher risks for an issue while definitive test verify the issue. Depending on local availability you can do non-invasive testing on a mothers blood sample as early as 10 weeks to see if DS is present. DS if present began at conception and cannot be changed. Your choice now is to either find out id the problem is there, or just prepare for it if it is true.

Depends on #of weeks: Whether or not one can prevent her baby from being born with Down syndrome depends on how far along she is in her pregnancy, because the only way is to prevent her baby from being born. She can ask her doctor if any more tests are needed, and what "intermediate risk" numbers are. For example, if 1/300 chance of DS, that means 299 out of 300 babies are expected to not have DS.

Prevention? No: It sounds you had screening blood test(s) for DS which does not provide definite answer. Definite answer (without false positive or negative) can be provided through genetic testing of fetal tissue obtained by amniocentesis. You need to see an obstetrician to have this procedure done if you wish so.

More definite tests: There are more definite tests to diagnose DS in the fetus, either by chorionic villus sampling or amniotic fluid examination. There is also a newer test that used only maternal blood. Once you know for sure if the baby has DS or not, you can make the decision whether to continue the pregnancy.