2 doctors weighed in:
Can a fragile x PCR blood test determine the sex of the fetus? My results say:female, 28 and 29 cgg repeats (negative).
2 doctors weighed in

Dr. Joseph Woods
Pathology
1 doctor agrees
In brief: No, just mutation.
The sex of the fetus is determined by karyotyping/cytogenetic analysis.
This test determines the extent of the trinucleotide repeat mutation using southern blot analysis. By determining the number of cgg repeats on the x chromosome, this method allows for more accurate assessment of risk for premutation carriers in terms of their own risk of these syndromes, and of having affected children.

In brief: No, just mutation.
The sex of the fetus is determined by karyotyping/cytogenetic analysis.
This test determines the extent of the trinucleotide repeat mutation using southern blot analysis. By determining the number of cgg repeats on the x chromosome, this method allows for more accurate assessment of risk for premutation carriers in terms of their own risk of these syndromes, and of having affected children.
Dr. Joseph Woods
Dr. Joseph Woods
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