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When does ancephaly develop? What age should they see it on ultrasound?

5 doctors weighed in
Dr. Stephen Camacho
Family Medicine
4 doctors agree

In brief: Absent brain

Most of the major organs have formed by 8-12 weeks so it may be possible to detect some defect at this early age.
Certainly with the blood tests for neural tube defects, the fetus is large enough by 18-20 weeks to tell for sure, which is when most fetal anatomy us take place.

In brief: Absent brain

Most of the major organs have formed by 8-12 weeks so it may be possible to detect some defect at this early age.
Certainly with the blood tests for neural tube defects, the fetus is large enough by 18-20 weeks to tell for sure, which is when most fetal anatomy us take place.
Dr. Stephen Camacho
Dr. Stephen Camacho
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