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What Does The Pregnancy Test Reading At 20 Weeks Indicate?
Question: Hello Doctor,
This question is about 20 weeks pregnancy test report readings. In our report, we found that our baby has a thick nuchal fold of 6.3mm.
To give more background on our case, our 12 weeks NT scan report had a NT of 1.08mm with a well formed nasal bone and our dual marker test gave us a ratio of 1:25000.
In the 20 week scan as well, all other readings are well within range and all measurements are within range. The measurements lie between 40 and 70pct. Head diameter is measured at 52nd percentile. The ratios are said to be within range as well. The only reading out of range is the nuchal fold which is at 6.3mm. Now our combined risk of first trimester and second trimester is increased to 1:2500, which the doctor said is still low risk.
Please advise.
Thanks
This question is about 20 weeks pregnancy test report readings. In our report, we found that our baby has a thick nuchal fold of 6.3mm.
To give more background on our case, our 12 weeks NT scan report had a NT of 1.08mm with a well formed nasal bone and our dual marker test gave us a ratio of 1:25000.
In the 20 week scan as well, all other readings are well within range and all measurements are within range. The measurements lie between 40 and 70pct. Head diameter is measured at 52nd percentile. The ratios are said to be within range as well. The only reading out of range is the nuchal fold which is at 6.3mm. Now our combined risk of first trimester and second trimester is increased to 1:2500, which the doctor said is still low risk.
Please advise.
Thanks
Brief Answer:
No need to worry
Detailed Answer:
Hi dear,
I have gone through your question and understand your concerns.
Yes, the combined risk of serum screening and nuchal fold thickness is very low (1:2500).Therefore, the risk of trisomies or chromosomal anomalies is not increased to that level in which the amniocentesis is required to do fetal chromosomal analysis.
Moreover, if there are no abnormalities or soft markers of down syndrome present in the anomaly ultrasound, then there is absolutely nothing to worry.
I will suggest her to get a fetal echo done at 22-24 weeks of gestation to rule out any congenital heart disease, which is also one of the cause of increased nuchal thickness.
Hope you found the answer helpful.
Regards
Dr Deepti Verma
OBGYN
MAternal and fetal medicine specialist
No need to worry
Detailed Answer:
Hi dear,
I have gone through your question and understand your concerns.
Yes, the combined risk of serum screening and nuchal fold thickness is very low (1:2500).Therefore, the risk of trisomies or chromosomal anomalies is not increased to that level in which the amniocentesis is required to do fetal chromosomal analysis.
Moreover, if there are no abnormalities or soft markers of down syndrome present in the anomaly ultrasound, then there is absolutely nothing to worry.
I will suggest her to get a fetal echo done at 22-24 weeks of gestation to rule out any congenital heart disease, which is also one of the cause of increased nuchal thickness.
Hope you found the answer helpful.
Regards
Dr Deepti Verma
OBGYN
MAternal and fetal medicine specialist
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Above answer was peer-reviewed by :
Dr. Nagamani Ng
Answered by
Dr. Deepti Verma
OBGYN, Maternal and Fetal Medicine
Practicing since :2009
Answered : 5064 Questions
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