Chances of due date at 10 weeks via ultrasound being incorrect?

[atomic sagebrush]

exactly!!!

[BabyCakes]

Thanks so much ladies. I really appreciate the in-depth information provided. It really helps explaining CM. GREATLY appreciate your time

I went to the Dr this week for the nipt (harmony) test and explained my doubts on the dates and why and so they are going to repeat the dating scan next week just to appease me! I will update you all- but fully understand that it is possible to have Oéd and not known and had nothing correlate with it BUT, I just want to make sure they didnt make a mistake because it affects when I HAVE to take mat leave.

I really appreciate you all.
xoxoxoxo
Thank you

[maidentomother]

That's great! I hope the dating scan goes well and you get your NIPT results back soon. Fx you hear healthy & pink.

[BabyCakes]

Hi Ladies,

I went for my follow up scan today and it was the same +5 days on my dates!! You were right!!

The tech said, "OR, it could just be a big baby" but both my children were born at 3.2 kgs (7lbs) so I think that would be weird. I thought that was a silly thing to suggest if dating scans are supposed to be accurate?

Your thoughts?

[atomic sagebrush]

I think the techs try to humor people - they know that their numbers are right but people do get highly invested on when they get pregnant - for a variety of reasons, some of which are a bit shady LOL (as in, baby daddy, not you obviously babycakes, but some people) and so they say stuff like that to mitigate any potential conflict.

[maidentomother]

Agreed!

[2blue1pink]

We are pretty positive of our dates (had ultrasounds early on that were 2 days behind, then right on exactly, including at a perinatal center by a sonographer for high risk pregnancies). Yesterday my nurse practitioner snuck me in for a quick check on the baby since I had a m/c a few months ago, baby measured the days ahead, I should have been 10w5d and was measuring 11w1d. They definitely won't change my dates on that but it is really normal for ultrasounds to be a couple days off. I have had a lot of ultrasounds in all of my pregnancies due to being high risk and in my experience the most accurate ultrasounds have been at 8-9 weeks. Before that, the babies have measured a couple days behind. And after that, they usually measure a couple days ahead. (DS1 was already a week ahead by 13 wks-by a high risk sonographer- and we were pretty sure of dates because we had done IUI.)
I would try to get them to stick to the date you think you ovulated if they will!

[atomic sagebrush]

The later in pregnancy, the more variation that sneaks in and the more likely it is to be off.