MaterniT21 Plus - Reliability of Gender results (2024)

Anonymous

Hi, my doctor just informed me the gender of my baby from the MaterniT21 Plus test taken when I was at week-10 (+3 days). I asked him whether it's accurate and he replied it's a commercial test and he went by their published probability rates. I was hoping that he would answer based on his experience with patients who took the test and have ultimately confirmed the accuracy of their babies' gender based on 20-week ultrasound, etc. May I ask if any mums who did the MaterniT21 Plus test had a baby whose gender is different from what's shown by the test? Many thanks MaterniT21 Plus - Reliability of Gender results (2)

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Anonymous

I can't answer your direct question but the genetic counselor at GIVF told me the accuracy for presence of a Y is very high. It doesn't tell you if you have an XXY problem but if it says Y, you have a boy.

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Anonymous

OP - I think they only just started telling people gender in the past couple of weeks, so it's possible that people haven't made it to 20 weeks yet!

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Anonymous

Thank you! We are not sure if we should make our purchase of baby clothes based on this test results as there wasn't any Y-chromosome detected...

Anonymous

i wonder if this would work with twins, esp if you had boy girl twins...i am new to pregnancy and dont even know what this test entails...just asking a general question for any that may know

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Anonymous

Anonymous wrote:Thank you! We are not sure if we should make our purchase of baby clothes based on this test results as there wasn't any Y-chromosome detected...

It's a girl! I'd be quite sure.

To the PP, none of M21 can be used for twins.

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Anonymous

if you're worried, just wait to purchase baby clothes until it is confirmed. It's not like there is going to be a run on the baby clothes!

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Anonymous

The materniT21 said it's a boy and the tech at the 20 week ultrasound said the same.

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Anonymous

I'd just hold off until 20 week ultrasound to buy clothes (or buy gender neutral stuff). Alternatively - buy the girl clothes, and just don't wash them and keep the receipts until you get confirmation via your ultrasound.

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Anonymous

Hmmm -- the genetic counselor at Fairfax told me that the detection of the Y chromosome should be about 98% accurate. That is pretty good, I think!

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Anonymous

We were told there was no y chromosome and the 20 weeks ultrasound confirmed it. Incidentally, I mentioned the tech at the 20 week scan that we thought we knew the sex due to the M21 and she said those results are very reliable.

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Anonymous

My sister just had her 20 week sonogram that confirmed she is carrying a girl. Her genetic counselor said the MaterniTi21 test was 99% accurate.

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Anonymous

My MaterniT21 said I was having a boy, but my 20 week ultrasound very clearly showed a girl. The genetic counselor told me that I am not the only one who has reported to their office that the gender results of their blood test were not accurate.

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Anonymous

^^^ wow, really??? This is shocking to me. I would think if it can test number of chromosomes it should be able to accurately tell if there is a y!!!

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Anonymous

My OB told me it had 99% accuracy. I guess 21:36 is part of that other 1%.

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MaterniT21 Plus - Reliability of Gender results (2024)
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