instruction: hello doctor what does high risk 50 trisomy 21 mean at an age of 32 and 18 weeks pregnancy
output: hello I totally understand your anxiety but please do not panic the risk for trisomy 21 or in other words down syndrome mentioned is 50 which is above the general population risk of 250 in other words if we take a general population and consider any women in general there is a risk that one in 250 women may have a baby who is affected with down syndrome but in your case the risk appears to be increased compared to the general population which needs to be evaluated further this is a test that determines the risk which means it is only a screening test and not a confirmatory test meaning the baby may or may not be affected by down but the risk appears to be high compared to the normal population it would have been helpful if you had the shared few more details like your period of gestation of your pregnancy when and at what gestation was the test taken and any previous scan reports in the first trimester you have done kindly share the reports to guide you better and also provide details if you had any previous pregnancy or miscarriages etc now coming to confirming this for definitive and accurate methods it includes amniocentesis with karyotyping and fish test which are little expensive tests and not done in all individuals except those with high risk for down syndrome for this test to be done the water around the baby inside the uterus is taken in a small amount which contains the shed cells of the baby and are cultured so as to do the chromosomal analysis of the cells this is an invasive test as it comes with the risk of 2 risk of miscarriage as we are putting a needle inside the uterus another recently introduced test which almost as closely accurate to this is nip noninvasive prenatal test which is again a screening test but highly accurate and involves only testing your blood for fetal cell free dna and then they are analyzed for the same you can consult a fetal medicine expert or your gynecologist for further information on these and necessary timely action I hope this helps