dates from the scan and the bedroom differ by 2 weeks - any experience?

[treacletart]

My friend who has experience of blighted ovum and also losing her last baby just a few hours after he was born, was understandably nervous when she went for an early scan today at what she thought was 8 weeks.
Took them a while to find anything but finally she was relived when they found a heart beat with an internal scan. Thing is, the sonographer dated the foetus at 6 weeks but my mate is convinced it should be 8 weeks and cannot be any later.
Now of course, she's worried the baby isnt developing properly - does anyone have any experience or advice I can pass on to help calm her nerves?

Dating scans at this stage can't be 100% correct. At the 20 weeks scan it will show a more precise date.

Everytime I go for a scan they change their minds on when I am due! We only had sex once the month I got pregnant so I know exactly when conception happened but they keep telling me its a week later or even 2 weeks later than when I think!

I can imagine your friend is very worried about this and the hospital should be able to do another scan for her in a few weeks to see what the situation is then.

Please pass on my congratulations and I wish her a happy and healthy pregancy :)

I was put back by 10 days and 17 days with both my pregnancies. Never was totally convinced ( ds was born 3 days befors due date and dd 8 days after - due dates being from the scans). I know it must be tough for her but as long as what they arre seeing is healthy and "normal" I'm sure she will have a healthy pregnancy. Fingers crossed for her.

This happened to me both times - I have v. long cycles (35 days plus) yet both times they refused to take this into account and assumed I'd conceived 2 weeks after last period - I knew when I'd conceived and that it was nearer 4 weeks after lmp! First scan with first pregnancy dated it at 7 weeks (fetal pole and flicker of heartbeat) but I reckoned it was barely 4-5 weeks - the measurements were small for their dates, not mine - was like that all the way though, he was always small for how advanced I should be, and indeed was quite a small baby, but the dates discrepancy didn't really have any implications - you deliver when the baby's ready bascially! By the way he was born at just 37 weeks by their reckoning, 35 weeks by mine! Same story second time around, only they kept on changing their minds about when the baby was due - at one point they reckoned she was so big I could have messed up completely and conceived a month earlier as my period was light - I didn't really go for this theory but she came at just 38 weeks so who knows!
Problem with scans is you focus too much on measurements and dates and it can cause a lot of uneceesary worrying. Hope everything goes well for your friend.

Cheers girls, 30something, my own experience very similar to your own and my first thought was something similar must have happened to her but It just seems odd that they dated the foetus younger - she seems convinced she knows exactly when she conceived and didnt have sex after that. Guessing her situation must be like Bobley's. My gut reaction is if it werent developing properly at this stage it wouldnt be here and they wouldnt have found a heartbeat. Just wish things could be straightforward for her she so deserves to be able to enjoy her preganancy - here's hoping she'll feel better after the next scan - seems a long way off right now.