SERIOUSLY?!?!?! MaterniT21 WRONG??!!??

Ok so I am almost 15 weeks now and had to go for another u/s b/c I have a low lying placenta and a SCH that has been making bleed for the last 8 weeks on and off. The tech today was looking more closely at the baby and so I said, "we already know he's a boy, can you just make sure all is well w/ the boy parts?" So she was looking and she was like "I'm not convinced this is a boy honey". What???? She told me that I would have to wait a few more weeks to get definite confirmation but that it didn't look like a boy to her. Now I am seriously freaking out b/c we have had the results from the MaterniT21 for like 3 weeks now and I have actually kinda fallen in love with the idea of having another son after initially feeling pretty disappointed. I mean don't get me wrong, I would be tickled if it's actually a girl but now I am wondering if everything is ok developmentally and how this genetic test could be wrong?? Does that happen?? Has anyone heard of that happening?? I feel like I am starting all over again!!

Happened with another member on the Harmony test so it is possible!

It supposedly happened with someone else HOWEVER I do not believe their baby is here yet and I still think the blood tests are MUCH MUCH more accurate. Human error does always occur but I would still operate under the assumption it's a boy.

I think they're 99% effective aren't they? So wrong 1 in every 100 cases but I would still want another scan. I would consider an elective one just to be sure in a couple of weeks xxx

At almost 15 weeks, I'd take that with a grain of salt. There is a reason most places won't even guess until 16 weeks, and some even later. Things develop at different rates and a clear pic of such a small area can be hard to come by. I'd just confirm down the road. By 20 weeks, a thorough check (with a full-on potty shot) should be definitive for gender. It's possible the Materni21 was wrong, however the chances that the tech is wrong is much higher. I bet it's tough to be in limbo though :-/

Thanks girls! I know the nurse told me when I got the results that it had like 99.5% accuracy or something like that. We have a name picked out and I feel like I am at peace with having another boy and then trying for a 4th baby at some point. I was not at all prepared to hear that yesterday! I just wanted to know that all was developing right b/c I'm such a Martha lol and just really want to know that he is ok in there!

Just wanted to update this thread. Kellbell had her 20 week uls and it is a boy:)

I really wish uls techs wouldn't make comments unless they are 100% sure about what they are seeing. I am sure this tech was tying to say to her that it is hard to tell at 15 weeks but, something like that said in passing can be upsetting!!

Thanks Wanting!!

The genetic counsellor I worked with, who knows Maternit21 very well, told me that her friend, who is a genetic counsellor at Sequenom, told her (lots of whisper-down-the-lane, I know) that they get at least 15-20 gender mistakes per week if they are processing 2000 blood samples per week. This is in line with the accuracy rates they publish (based on a single study) but SOMEONE, somewhere has to be in the small minority of test users who get wrong results. These tests are highly accurate, but not perfect, and gender mistakes are always possible. They're unlikely, but that doesn't mean they never happen.

We are years down the road with these tests now and I think we can say pretty definitively, that they WORK pretty darn well. Rumors and innuendo about what tech or counselor said something to who, when, where, and why, is NOT EVIDENCE. People who had cryptic ultrasounds the techs couldn't read or a tech that disagreed, and are then using that to debunk these tests - also not evidence. We have had people show up on the site, make claims about how these tests were wrong because their ultrasounds didn't agree but NONE OF THEM EVER CAME BACK TO UPDATE when their baby actually arrived.

There may be some distant possibility that some of these tests are not correct for gender and the company quotes about 1% error rate. But they are much, much more reliable than ultrasounds and please do not allow these threads with no actual data in them, to give you false hope or false despair. If you had a Nip-t/Nifty test done, the odds are sky high that it was correct for gender. We have techs guess wrong on ultrasounds every day around here, of all gestations. If the ultrasound doesn't agree, it's much more likely that the ultrasound is wrong and not the Nip-t/Nifty tests.

Nettle tea,
Wrong thread

I was enrolled in a study for one of these blood tests when I was pregnant with DD a few years ago. They were trying to assess the accuracy when patients were on certain types of medications made from human and/or animal-derived ingredients, in my case Lovenox, which is made from the intestinal mucus of pigs. They did two different blood draws for it and wouldn't you know, one said I was having a boy and one said I was having a girl. Either my tests fell into the standard lab error range or my medication did affect the results. I have not heard any more about this study since my doctor put me in it, so I don't know if it's been completed or not.

Wow interesting THANK YOU so much for posting this!! Very helpful!!

Happened to me at 20 weeks when I had my ultrasound and to everyone's surprise it was a girl even though maternity 21 said definitely boy at 11 weeks! Shock and confusion ensued...even my doctor was "baffled" with the results and after speaking to genetic counsellors, told me that two can be the possible cases: 1st: I had a vanishing twin and second amniotic sack which although did not grow was still showing in my ultrasound at 10 weeks so maybe it was a boy thus that was what blood test picked up or 2nd : my baby girl could have Turners syndrome!! Of course I am one of these people who can go crazy by not knowing, so immediately I had an amino and second extensive ultrasound at a specialist fetal medicine center only to find out my girl is perfectly healthy and was told I should have never done the maternity 21 when I had a vanishing twin in me as the results would very likely be inaccurate! Was very annoyed with my doctor, if I knew I would not even have bothered with the naterni21 and would have gone straight to amnio testing...i have finally calmed down and can now enjoy my pregnancy!

I'm so sorry that this happened to you! I can understand how upset and frustrated you are, especially when you weren't fully informed about the tests limitations given your situation. This is why I will not be doing any NIPT testing, because I too may have a vanishing twin. I will know for sure at my NT scan in 2.5 weeks.

I'm glad that everything is ok with your baby! Hopefully you can enjoy the rest of your pregnancy now!



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Originally Posted by WantingPink

Just wanted to update this thread. Kellbell had her 20 week uls and it is a boy:)

I really wish uls techs wouldn't make comments unless they are 100% sure about what they are seeing. I am sure this tech was tying to say to her that it is hard to tell at 15 weeks but, something like that said in passing can be upsetting!!

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:agree: I suspect this is what the end of the story was in EVERY one of these threads, even the ones that did not update.

Some of the techs are simply not that good, others may be great but are having an off day, weird things happen. Anyone who stumbles onto this thread, PLEASE go off blood tests and NOT ultrasounds.

I'm so sorry Kathy, yes, that was a mistake on the part of the doctor and not the Materniti21 test being wrong though (just to clarify for anyone who is confused right now). If the vanishing twin was a boy then that could def. mess with the results.

I'm so sorry for the hullabaloo but huge congrats on your healthy baby girl!!!!