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Frequently Asked Questions
The Double Marker Test – First Trimester is a prenatal screening blood test done during early pregnancy. It helps assess the risk of chromosomal abnormalities such as Down syndrome (Trisomy 21) and Edwards syndrome (Trisomy 18) in the developing fetus.
An NT scan is an ultrasound test, while the Double Marker is a blood test. Both are performed in the first trimester to evaluate the risk of genetic abnormalities in the fetus.
This test can be done between 9 to 13 weeks, but is most accurate between 11–13 weeks when combined with the NT scan.
No. It is a simple blood test and is completely safe for both mother and baby. Only mild discomfort may occur during blood sample collection.
No fasting is required. You can eat and drink normally before the test.
Combined Risk Assessment uses: Double marker blood test results NT scan values (NT in mm, CRL, Nasal Bone) Maternal details (age, weight, smoking, diabetes, IVF pregnancy, etc.) This combination increases accuracy in estimating the risk of chromosomal disorders.
A negative screen indicates a low risk of chromosomal disorders like Down syndrome or Trisomy 18. However, it does not guarantee a completely healthy baby.
The test screens for risks of: Down syndrome (Trisomy 21) Patau syndrome (Trisomy 13) Edwards syndrome (Trisomy 18)
The test is performed using a simple blood draw from the pregnant woman. It is noninvasive and completely safe for the fetus.
No. It is a screening test, not a diagnostic test. It identifies risk levels, not exact abnormalities. For confirmation, tests like NIPT, CVS, or Amniocentesis are needed.
Down syndrome (Trisomy 21) is a genetic disorder caused by an extra copy of chromosome 21, leading to physical and intellectual developmental challenges.
Edwards’ syndrome (Trisomy 18) is a rare and severe genetic disorder caused by an extra chromosome 18. It leads to major developmental and medical complications.
If you miss this test, the doctor may recommend a Quad Marker Test, usually performed between 15–21 weeks of pregnancy.
No, it is optional. However, doctors strongly recommend it for early screening, especially for women: Above 35 years With family history of genetic conditions With previous abnormal pregnancy outcomes
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