MaterniT21 test...

JKGymnast

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  

CaliCarly77

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.  

10-4LilBuddy

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.

YouMe&Bax

Also, please be aware the chances of false positives are increased with twins. 

KaloramaKB

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.