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Question related to nipt
Hi my double marker report shows screen positive biochemical risk trisomy 21 nd ratio is 1:123 and trisomy 21+NT is 1:784 . As per genetic advice due to my husband side family history we have done karyotype test for husband which report has come and it's normal. Now genetics advice me to have nipt test which is also done nd report will take time 1_2weeks . My question is there is how many chances of having gud report .As I m very much worried.
Both double marker and nipt are screening tests, ie. they only tell about how high is probability for baby to be effected. Nipt has advantage that its senstivity and specificity to screen downs syndrome is very high ,upto 99%. But still its just a screening test. Confirmation can be done by amniocentesis. As of now wait for ur nipt result and discuss the result with fetal medicine expert and understand the chances of down syndrome and risk factors. And accordingly take decision.dont panic.
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1. NT + Double marker test + Maternal age: 91% efficacy with 5% False positive report (Screening test)
2. NIPT test: 99% efficacy (Screening test)
3. Amniocentesis: 100% efficacy (Confirmatory Diagnostic test)
Do not take any adverse decision on the bases of NT scan as it's only screen test. Do Amniocentesis for final decision as its Diagnostic test
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