At around 13 weeks of pregnancy, certain measurements during the nuchal translucency (NT) scan are important for assessing the risk of chromosomal abnormalities. The CRL (crown-rump length) of 73.5mm and FHR (fetal heart rate) of 166 bpm are generally in the range you’d expect at this gestational age. The NT measurement of 2.4mm is also within typical limits but it’s closer to the upper end of normal. Generally, anything under 3.0mm is considered to be within the normal range, but keep in mind that NT measurements need to be considered in conjunction with the mother’s age, blood tests, and other factors to accurately assess risk. The nasal bone (Nb) measurement of 3.5mm is another parameter that’s typically checked, and its presence and measurement here typically supports normal development, assuming everything else correlates well. However, these findings should ideally be reviewed alongside an integrated screening that includes biochemical markers from blood tests for a more comprehensive risk assessment. It’s typically a good idea to discuss these results with your obstetrician or a maternal-fetal medicine specialist who can give you an interpretation tailored to your individual risk factors. They can help you understand if any further follow-up or testing, such as non-invasive prenatal testing (NIPT) or diagnostic tests like CVS or amniocentesis, might be warranted. While your measurements seem mostly reassuring based on generalized data, definitely consult your healthcare provider for personalized advice suited to your unique pregnancy and health history.
What is the normal range for NT scan results at 13 weeks of pregnancy?
I am 13 week 2 days pregnant.In my nt scan at 13 week 2 days CRLis 73.5mm NT is 2.4mm Nb is 3.5 mm and fhr 166 bpm ? Is everything normal?
Have you had any previous ultrasounds or scans during this pregnancy?:
- Yes, oneHave you experienced any symptoms such as bleeding or cramping?:
- No symptomsDo you have any known medical conditions or pregnancy complications?:
- No known conditionsWhat was the reason for your NT scan?:
- Routine check-upHow is your overall health and well-being during this pregnancy?:
- Occasional fatigue or nauseaHave you received any counseling or information about the results yet?:
- No, not yet100% Anonymously
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Doctors' responses
Hello dear As per clinical history the findings are consistent and not abnormal CRL or Crown Rump Length .it is 73.5 mm and is ok NT or Nuchal Translucency. It is 2.4 it should be below 3. Nasal Bone NB is also okPresence of a nasal bone is reassuring. FHR or Fetal Heart Rate.it is 166 bpm it in range ( 120-180) So donot worry Regards
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