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MaterniT21 test...

JKGymnastJKGymnast member
in Multiples

I'm having a hard time finding an answer to this (silly) question...

I'm 35 yrs old and at 12 weeks my OB will run the MaterniT21 blood test.  They said what the test will be checking for, and also mentioned it would also confirm the gender.  

My question is - wouldn't it just be able to determine the gender of one baby... It wont show up with both X & Y chromosomes, right?  Has anyone had this test done?

Thanks :) 

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Re: MaterniT21 test...

  • CaliCarly77CaliCarly77 member

    Hi! 

    Right - the test will tell you IF there is a Y. So it can confirm no Y (so 2 girls will be confirmed)  OR yes Y which will tell you only that one or both are boys. 

    We opted not to find out the sex.

    And our Trisomy results were negative (otherwise, you have to find out if one or both twins have it, by way of amnio or CVS) - i.e. it can only tell you NO, or YES (for one or both)

    This is confusing, I hope I explained it well.  

    ********************************************************************************************
    Married my best friend, June 8, 2008

    5/17/13 BFP!!! 6/6/13 - OMG its TWINS!

    Josie and Lexie were born on January 4, 2014 at 37w2d
    Josie was 5lbs2oz, Lexie was 4lbs15oz 
    Both had a 9 APGAR score with no NICU time
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  • 10-4LilBuddy10-4LilBuddy member
    PP is correct. For genders, if it detects a Y, then you know you have boy/girl or boy/boy. If no Y, then two girls. For trisomy, it will tell you yes or no, but not which twin.
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  • YouMe&BaxYouMe&Bax member
    Also, please be aware the chances of false positives are increased with twins. 
    Me: 30, DH: 40 
    TTC since January 2012HSG & Bloodwork: Normal, SA: NormalDx: Unexplained Infertility 50mg Clomid + TI = BFN (three cycles)
    50mg Clomid + trigger + IUI = BFP (one cycle)
    Beta #1 (12dpo) = 49  Beta #2 (14dpo)= 149

    Expecting g/g twins Oct '13


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  • KaloramaKBKaloramaKB member
    I had the test done and the results showed that a Y chromosome was detected. I am finding out tomorrow at 16w4d if they are boy/boy or boy/girl.
    BFP #1 on 12/15/11 but missed m/c with d&c on 2/1/12.
    BFP #2 on 5/1/13 = boy/girl TWINS with EDD of 1/3/14 but expected no later than 12/20/13.
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