Gender on blood test different than ultrasound?? — The Bump
2nd Trimester

Gender on blood test different than ultrasound??

a&abestica&abestic member
edited August 2017 in 2nd Trimester
We had a blood test done at 10 weeks and it said girl.  Just had my 19 wk anatomy ultrasound and the tech said boy..?? I'm now shocked and confused.  I was completely prepared for a girl and the dr said the test was probably just wrong..?  Has this happened to anyone?  Any chance they were just seeing the cord?  Legs were crossed and covered the bum the whole time and baby wouldn't move them .. not sure if that makes a difference or not ..
thanks!

Re: Gender on blood test different than ultrasound??

  • Oh which test was it? There is a small margin for error either way (blood test and ultrasound) 


    Spontaneous pregnancy #1
    DD1 July 31, 2011

    Trying for #2 since Oct 11
    732973 Clomid Cycles
    2 IUIs 
    3 Fresh IVFs= 1 Ectopic treated with MTX
    Spontaneous pregnancy #2= Ectopic #2= lost left tube
    Spontaneous pregnancy #3= DD2 January 29, 2016
    Spontaneous pregnancy #4= Ectopic #3
    Spontaneous pregnancy #5= Baby #3 is a BOY!!! 



    BabyFruit Ticker
  • I'd take the blood test over ultrasound, the blood test is a genetic screening so tends to be acurate. The ultrasound your trusting the eye of a tech. And if the baby wasn't all that cooperative i'd be hard to say.
  • Loading the player...
  • This exact thing happened to me. My blood test ( testing for genetics and disabilities) said girl and my 18 week ultrasound said boy. I now have a healthy 1 year old boy
  • From what I understand about the blood test and how it determines sex, they look for evidence of a Y chromosome in your blood. If there is none, then they will say it's a girl, but that's not 100% because it could just be that there weren't enough Y chromosomes to detect. If they see a Y, then they know it's a boy because, as a woman, you don't have any Y chromosomes. So it is possible that they didn't see any Ys and therefore said girl, but there just weren't enough Ys to detect it at the time of the test and it is, in fact, a boy.
    Me: late 30s | H: early 30s
    TTC #1 since April 2015
    RE Dx: Fibroids, surgery Jan 2016
    IUI #1 and #2, Nov/Dec 2016, BFN
    IVF March 2017: ER - 5R/3M/3F, 1 PGS normal
    Polyp removed May 2017
    FET May 2017 - BFP!
    Baby boy born 2/2/18

    [Deleted User]LadyMillildownhilldiva
  • From what I understand about the blood test and how it determines sex, they look for evidence of a Y chromosome in your blood. If there is none, then they will say it's a girl, but that's not 100% because it could just be that there weren't enough Y chromosomes to detect. If they see a Y, then they know it's a boy because, as a woman, you don't have any Y chromosomes. So it is possible that they didn't see any Ys and therefore said girl, but there just weren't enough Ys to detect it at the time of the test and it is, in fact, a boy.
    This.  I would go with the ultrasound.  Go to a different place for a second opinion ultrasound if you want - but those early tests have a margin of error ESPECIALLY when they tell you it's a girl for the above reason.
    eggplantfaceLadyMillildownhilldiva
  • From what I understand about the blood test and how it determines sex, they look for evidence of a Y chromosome in your blood. If there is none, then they will say it's a girl, but that's not 100% because it could just be that there weren't enough Y chromosomes to detect. If they see a Y, then they know it's a boy because, as a woman, you don't have any Y chromosomes. So it is possible that they didn't see any Ys and therefore said girl, but there just weren't enough Ys to detect it at the time of the test and it is, in fact, a boy.
    This is what I was told. As small of an error as it is, there is a higher chance of error with saying it's a girl because you can just not have picked up enough to recognize the Y chromosome yet if there is a Y chromosome there is a Y chromosome. 
          
Sign In or Register to comment.
Choose Another Board
Search Boards