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  1. #1
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    Default NT Tests Timing

    Can anyone tell when is the best time to do NT scans for D/S.

    Blood Test (at 10 weeks) - Is it at the start of the 10th week eg. 9 weeks 2-3 days or after completing 10 week eg. 10 weeks 2-3 days

    U/S (at 12 weeks) - Same question as above.


    Thanks.

  2. #2
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    We were told the u/s was to be done between 11w3d and 13w6d. The blood test needs to be done between 9w and 13w6d. As long as the blood test is done before the ultrasound, they will factor in your dates.

    P.S. our test was done 3 months ago.

  3. #3
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    Bloods after 10 weeks and US is most accurate 12-13+6 weeks. Preferably the 12th week.

  4. #4
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    That is counting weeks from LMP, correct? Not from conception? That always confuses me as there is a two week difference...

  5. #5
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    Quote Originally Posted by Leisylou View Post
    That is counting weeks from LMP, correct? Not from conception? That always confuses me as there is a two week difference...
    Yes weeks from LMP

  6. #6
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    Thanks all.

    I think it is confusing.

    Check this link
    http://www.amazingpregnancy.com/dued...day=&old_year=

    There are many other links like this.

    According to thi,s seems like first week from LMP is not counted.

    I also need to get my week right in order to book a right date for my tests.

    If I can't figure out, I will call my OB and also radiology where I had my dating scan. During the dating scan I didn't pay attention to this and also forgot to check with OB.

  7. #7
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    It's definitely from your LMP

  8. #8
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    So if first day of LMP is 1 Oct 2013 then first week will start from 1 Oct and finish on 7 Oct? Then second will start from 8 Oct?

    Seems like starting week from first day of LMP is counted as Week 0. So with above example first week will start on 8 Oct and finish on 14 Oct then second week will start on 15 Oct?

    Thanks

  9. #9
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    When you ring to book in for the NT, you will give them you LMP & then they will tell you when you need to have both tests done. They prefer you to have the bloods 3 or so days before the u/s. I think the later you have if the more accurate but don't quote me on that


    DH 37 + me 33 = DS1 March 2010 & DS2 July 2013


 

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