Dating scans - Urgent help please

[Mummatotwo!]

Can anyone please tell me when the most accurate time is for a dating scan is???

Obviously i dont need my pregnancy dated lol as i am 36 weeks.
But i had a scan done at about 5 weeks, and it put my EDD date being 7th September.

I was under the impression that the most accurate time is between 7 and 9 weeks.
I had a repeat scan done at about 8 weeks and it gave me an EDD being 10-11th September.

I realise there isnt much difference, but my hospital wants to carry out a repeat c section and they are taking the EDD as the 7th sept, they want to do the c section at 38 weeks, if they use the date of 7th sept then he coupld be coming out closer to 37 weeks i dont want the baby out early of course so i really want to be armed with the best information so i can negotiate my birth plan.

Does anyone have any ideas? or any research into the best time?
TIA

[visitor1]

My GP i had with DD2 sent me when i was around 7 weeks...and the date i was given then was 21 oct.....then my 18 weeks scan said 23 oct. But Gp always said the best time is between 6-8 weeks.

If you dont want a c/s say no...its your body!

ETA:

The best time to have a scan is from about 7 weeks’ gestation

[christy]

I would always go with the later date. You have every right to explain that you want to go with the later date for the c/s because you understand the risks associated with having a c/s too early.

[*mitch*]

I agree with Christy... I had a Preterm c/sect & had to spend time in the NICU... If you dont need to be there... then why risk it.... thats my thoughts anyways...

Why are they doing a c/sect? Is there a medical reason for you or bubs? If so they should be monitoring you both anyways???

Otherwise.. can they do another scan & try & estimate from that.. or maybe it is a little too late LOL..

[satya]

The date they gave you at the earlier scan is supposed to be the most accurate but in my case I went a week and 4 days earlier than it and it turned out to be closer to the date I was given at the 12 week scan.

[Junglemum]

Technically the earlier scan would be more accurate. However, we are talking fractions of mm making a difference of a day or so. And 8 weeks is still early enough to have an accurate dating scan.

I too would argue that you were given a later date at an 8 week scan, which is still an accurate time to date a pregnancy, and you would feel more comfortable going by that date rather than your earlier one.

Good luck.