#asktheexpert can double marker test done before nt scan or both at a time we should do??

Question

Accepted Answer

The Double Marker Test and the Nuchal Translucency (NT) Scan are both used for screening Down syndrome and other chromosomal conditions, but they are typically done at different times and may be performed either separately or together. Here’s the usual approach:

1. Double Marker Test:

Timing: This blood test is typically done between 11 and 14 weeks of pregnancy.

Purpose: It measures two substances in the blood — PAPP-A (Pregnancy-Associated Plasma Protein-A) and free beta-hCG. Based on the levels of these markers, along with other factors like maternal age, the risk of Down syndrome and other chromosomal disorders is assessed.

2. Nuchal Translucency (NT) Scan:

Timing: The NT scan is also performed between 11 and 14 weeks of pregnancy.

Purpose: This is an ultrasound scan that measures the thickness of the nuchal fold (fluid-filled space at the back of the baby’s neck). An increased thickness may be a marker for chromosomal abnormalities like Down syndrome.

Can Both Be Done at the Same Time?

Yes, both tests are often done together during the same visit if you're within the correct timeframe (11-14 weeks). In fact, combining both tests increases the accuracy of screening for Down syndrome and other conditions.

Can the Double Marker Test Be Done Before the NT Scan?

Yes, the Double Marker Test can be done before the NT scan, but it’s typically done around the same time (11-14 weeks). If you are unable to get both done together, you may choose to do them at separate times, but it's best to have them within the same window.

Conclusion:

Both tests can be done together, but they can also be done separately as long as they fall within the appropriate time frame. It’s best to consult your doctor about the ideal timing based on your specific pregnancy and circumstances.