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Get updates on how your baby develops, your body changes, and what you can expect during each week of your pregnancy by signing up to the Mumsnet Pregnancy Newsletters.

Pregnancy

How much do most people's dates change (if at all) at the 12 week scan?

44 replies

porpentine · 12/05/2011 10:32

I ask because I wanted the nuchal scan but my appointment's not until I'll be 13+4 - which seems cutting it a bit fine if I'm a couple of days out (and at a previous scan I was 2-3 days further on than they first thought).

So are most people pretty accurately what they thought they'd be at their 12 week scan, or does it change a lot? Just trying to get a sense of how likely it is that they'll be able to do the nuchal...

OP posts:

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ct148 · 12/05/2011 10:33

My dates only changed by a day. So originally my due date was 24 Aug, then after the 12 week scan they changed it to the 25th.

caz05 · 12/05/2011 10:37

Mine changed from 1 June to the 9th June at the 12 weeks scan

BrassicaBabe · 12/05/2011 10:43

Mine changed by 2 days.

Eglu · 12/05/2011 10:47

Mine changed by 11 days with DS1, but I have a long cycle, so don't fit the mould so to speak.

Flowerydems · 12/05/2011 10:48

I had my scan at 13+3 apparantaly they try to get it as close to 13 weeks as possible now which was really frustrating (especially since I'd started counting down the days til week 12).They managed the nuchal fine with me though and she seemed quite happy. I was only 1 day less when they checked the size of the baby though.

xx

ToriaPumpkin · 12/05/2011 10:50

Mine changed by one day.

TallulahBetty · 12/05/2011 11:06

One day here too.

Bumpsadaisie · 12/05/2011 11:41

By a couple of days (later). Mind you I know I ovulate on about day 20 so I was expecting to be put back a little from what the "LMP" calculators said.

Isntitironic · 12/05/2011 11:46

Mine went back by 4 days - 29th Sept to 3rd Oct.

pirateparty · 12/05/2011 11:46

One day different with this one, and three days with ds.

OrangeGloss · 12/05/2011 11:48

Mine changed by 11 days, I had a 35 day cycle, and has been consistent with this measurement since

PrincessScrumpy · 12/05/2011 11:53

Mine changed by a week to what I thought my dates were as my cycle is short and very regular.

LoveBeingAbleToNamechange · 12/05/2011 12:08

Mine changed by about three weeks, but it was due to very specfic circumstances. It meant I wasn't able to have that test. I had already moved my scan date after thinking the one they'd given me was a bit late! Just call and see if they have had a cancelation.

prolificwillybreeder · 12/05/2011 12:12

Mine changed by two days.

buttonmoon78 · 12/05/2011 12:20

Mine changed by about 10 days. For them that is. I 'knew' when I was due, had a scan at what they said was 5 1/2wks, then one at what they said was 7 1/2wks then one at what they said was 12 weeks and they said I was 13 1/2wks. Quel suprise!

Happened last time too.

lolajane2009 · 12/05/2011 13:03

5 days later here but i have a 35 day cycle

largeginandtonic · 12/05/2011 13:06

Am the same as Lola. Mine always change by a week or so as i have a long cycle.

I am glad about this as there is no way i want them jumping up and down at the end about a late baby when i know perfectly well it is not late!

Badgerwife · 12/05/2011 13:12

Mine changed from 28 July to 22 July. I must have ovulated straight after my period, which I didn't know was possible.

KatieWatie · 12/05/2011 13:45

Mine changed by just 2 days which was amazing considering how messed up my cycle was at the time, some bleeding going on etc. so we'd just taken a wild punt at the EDD.

vallinnapod · 12/05/2011 13:45

Mine was bought forward from 9 Sept to 4 Sept....which I though was interesting considering it was IVF therefore all dates were fairly indisputable!

He has been consistently 1 day ahead in all his measurememnts of even this from 14 weeks!

porpentine · 12/05/2011 20:21

Hmm, definitely will try and get a cancellation then. This is all very helpful - thank you!

OP posts:

ImBrian · 12/05/2011 22:49

With my first pregnancy I was put back 2 weeks, 2nd was bang on, 3rd was put back 3 days and this one put back one day. I have irregular cycles

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LDNmummy · 13/05/2011 00:37

Mine was spot on to the day. I take it as a good sign of a cooperative LO in the future

oldboy · 13/05/2011 06:26

I had a scan at 7 weeks and was given a date a week later than i had worked out then at 12 week scan a diffrent one again which was 3 days diffrent. And with ds was 12 weeks at scan and was told was 13weeks.

voodoomunkee · 13/05/2011 06:37

Mine has gone back by 2 days, which is interesting as I would have been at the start of the messy bit! Never mind, I think I just have big babies!

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