Reply to Fetal Fraction at 21 weeks

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[quote=Anonymous][quote=Anonymous]Hi, 10:40, this is the real OP:

Hi, 10:40, this is the real OP. Did you retest? I'm very sure my test would have shown Low Fetal Fraction at 11 weeks. It looks like 3-4% fetal fraction and up renders an accurate screening. I discovered several things: Being overweight, having an autoimmune disorder, and recently exercising can all cause low fetal fraction. The good news is, having too high of fetal fraction seems to be linked to worse things, such as pre eclampsia.

I, myself, have Hashitmotos. Perhaps that accounts of my low fetal fraction.

My regular OB did not offer this screening in the first trimester. I'm a little confused by that. I have a history of trisomy miscarriage and IUGR. [/quote]

hi OP, this is 10:40. i did a retest at 12w5d and I am waiting for results. My obgyn didn't think anything of the failed test but of course I had to investigate and now I am freaking out. there are several other things that correlate with low FF (at 11-13 weeks at least) such as age and some other stuff. this is the best article I found on the topic

http://onlinelibrary.wiley.com/doi/10.1002/uog.15851/full

there is a lot of useful info here especially on the tables but it's all about the early testing. So not exactly your situation but as you say it could be related because FF rises over time so yours could have perhaps been low as well in this stage.[/quote]

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