https://boards.hellobee.com/ Pregnancy, Baby and Parenting blog, by Hellobee en Thu, 23 Apr 2026 01:27:16 +0000 https://boards.hellobee.com/topic/nt-scan-and-gender#post-991418 Mon, 05 Aug 2013 19:04:49 +0000 Vegmama 991418@https://boards.hellobee.com/ <p>We are team green, so no personal experience ... but two things:</p> <p>1) I personally know someone who was told the sex of their baby during the NT scan, based on the u/s alone.</p> <p>2) I know that with even early miscarriages (if you decide to do pathology on the tissue), they can tell you the sex of the baby ... </p> <p>So, I imagine, the blood test at 13 weeks or so would be accurate to a pretty high degree. </p> https://boards.hellobee.com/topic/nt-scan-and-gender#post-991404 Mon, 05 Aug 2013 18:58:31 +0000 ShootingStar 991404@https://boards.hellobee.com/ <p>I had the MaterniT21 test at 10 weeks and it said boy, which was confirmed with 2 ultrasounds. If the results say girl, it's *possible* that they just didn't have any Ys show up in your sample, potentially because it's too early. </p> <p>And there's a tiny percentage chance of it being wrong if it says boy, too. My friend's wife is a genetic counselor and she explained it to me, because I was very confused at how it could happen. Basically, it has something to do with the placenta having a very slim possibility of producing Y chromosomes, even though the baby is genetically a girl. But it's such a slim chance, you'd basically be a case for a text book. </p> https://boards.hellobee.com/topic/nt-scan-and-gender#post-991349 Mon, 05 Aug 2013 18:34:43 +0000 Mrs. Jacks 991349@https://boards.hellobee.com/ <p>Chromosomes don't lie :) </p> https://boards.hellobee.com/topic/nt-scan-and-gender#post-991317 Mon, 05 Aug 2013 18:20:37 +0000 sorrycharlie 991317@https://boards.hellobee.com/ <p>my friend had that test done and said it was accurate for her! well, she's still pregnant, but she said it was obvious.</p> <p>as far as the guess via ultrasound, there's the whole "nub" theory - and it was right for us! </p> https://boards.hellobee.com/topic/nt-scan-and-gender#post-991306 Mon, 05 Aug 2013 18:17:33 +0000 Espion 991306@https://boards.hellobee.com/ <p>The blood test is very accurate. Our OB guessed "girl" on the NT ultrasound and we discovered that we were having a boy on our anatomy ultrasound! Ultrasound has a much lower sensitivity the earlier you are in gestation. It is hard for chromosomes on a karyotype to lie! </p> https://boards.hellobee.com/topic/nt-scan-and-gender#post-991295 Mon, 05 Aug 2013 18:12:55 +0000 lilteacherbee 991295@https://boards.hellobee.com/ <p>It sounds like you're talking about the maternit21 test. I had it done at 12 weeks and we found out the results a week later. I had it because it checks for chromosomal abnormalities (I miscarried our first baby and it was later found out she had an abnormality that caused the 2nd X chromosome to not form completely). From what I understand, it's usually offered to those who are high risk for chromosomal defects.</p> <p>They told me it was 99% accurate. We're having a boy- there's pretty much no other way for there to be a Y chromosome in my blood unless the baby is a boy! We've had 2 ultrasounds since and they have confirmed the gender. </p> https://boards.hellobee.com/topic/nt-scan-and-gender#post-991284 Mon, 05 Aug 2013 18:08:47 +0000 lavender 991284@https://boards.hellobee.com/ <p>I had my NT scan today and my u/s tech said it was possible to determine the sex of the baby via fetal blood work. She said it was a relatively new test- the blood work would show either the xy or xx chromosome. This was all new to me, has anybody have any experience with it and how accurate is it compared to the 18 week u/s? </p>