NIPT low fetal fraction
Hi everyone. I’m 12+4 with modi twins and I had to do a redraw for the harmony test because my fetal fraction was only 3.4% and they require 4% to perform the test. I was 11 weeks at the time of the first draw. Has this happened to anyone else? A bit anxious as I see the average should be around 8% at 11 weeks. Also my BMI is average.
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