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QuestionHello doctor,
I am 32 years old this year. I am pregnant with the second baby at 23 weeks. I went to the doctor and all indicators were normal except for the baby's nose bone reaching 5.5mm. The examining doctor said that the baby's nose was a bit short compared to the standard, because at week 20, the baby's nasal bone measured 5.2mm. I did the Double test at 12 weeks and got a low risk of 1:547. So the doctor asked me if my baby has a short nose bone at 23 weeks? Is my baby likely to have Down syndrome? Is my NIPT test accurate now? Thank you doctor.
Nguyen Do Hong An (1989)
Answer
Answered by Specialist Doctor I Truong Nghia Binh - Department of Obstetrics and Gynecology, Vinmec Danang International General Hospital.
Hello,
With the question "Is it okay to have a short nose bone at 23 weeks? ", the doctor would like to answer as follows:
Nasal bone hypoplasia or nasal bone shorter than gestational age according to each stage. This phenomenon is closely related to Down syndrome. However, nasal bone length also depends on genetic and ethnic factors. Asians will have shorter noses than Europeans, parents with flat noses, children also have short nasal bones.
With your current ultrasound results, it is concluded that the nasal bone is short. With your current condition, amniocentesis should give the most accurate results.
If you do the NIPT test, you should consider it because it is a screening test, although sensitive and specific, it does not rule out 100% of Down syndrome. For more complete and specific advice as well as monitoring measures in this pregnancy, you should go to large hospitals, specializing in obstetrics and antenatal screening for examination.
If you still have questions about the 23-week fetus with short nasal bones, you can go to the hospital of Vinmec Health System for further examination and advice. Thank you for trusting and sending questions to Vinmec. Wishing you lots of health.
Best regards!
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