dating scan = CONFUSED

This is something I have been thinking about. My first was put back 9 days!!! I was so confused. I had been keeping track (loosely) of my cycles.....mainly AF and when I thought I Ov'd. I was pretty sure I had ov'd on time that month so couldnt understand why my dates were put back. However I hadnt done a HPT early.

Now I am waiting on a late AF but with no BFN so I have been thinking. this month I paid more attention and around day 14-15 I had all my ov signs. I tried some old expired OPKs but got nothing....figured they were just old and expired. Then a week later I got STRONG ov signs. AND a positive OPK. So wonder if with DS1 the same thing happened...an attempted ov mid cycle and then proper one a week later...therefore putting my dates back.

Bottom line, even though you will, try not to worry. There is most likely absolutely nothing wrong....and if there is, there isnt anything you can do to stop it so try an dthink positive and enjoy the pregnancy.

I am also quite confused about the whole dating thing - I know they work it out based on the last menstrual cycle but I actually wrote down the day we did it without any protection (tmi sorry) and by that day we I should be 2 and a bit weeks less then what they say I am. I told that to the lady doing my scan but she still insisted that my dates are what i've been told. So now we're wondering if something happened the 2 weeks earlier or if baby is possibly just big because she said his measurements are exactly what they should be for my date.....its all very confusing because surely if he was concieved the date we are certain he was he would be smaller in size ?!? its all very confusing.

My cycle is about 32 days too. I had a scan at what I thought was 5 weeks and was told that it was more like 4 weeks. We went for another 2 weeks later, so we are going off the scan dates.

That puts LMP 26-08-10 and EDD 08-06-11.
(and EDD by LMP at 01-08-11).

I also got put back a week with both boys (one was born on his scan EDD the other on his LMP EDD).

Hope that helps... it will all be fine and remember, its only an estimate!

I think it's pretty hard for them to measure, you're only talking a couple of millimetres at this stage so an innaccurate measurement could mean a few days difference. I had my scan at 6 wks 6 days and measured 6 wks 1 day. It seems really common so try not to worry!

sperm can live for a week can't it? so maybe conception just happen quite a while after the sex occured.

At my early scan with number 2 I got put forward 2 days after they did an internal scan as via internal the baby measured 2 days bigger than through the tummy so that makes a difference too, not a huge amount but a difference.

Did they say the heartbeat was slow? This time I had a scan at 7w 5d cos of a bleed and I thought the heartbeat looked slow but I asked the lady and she said it was perfect. Maybe ask you LMC cos it normally gets noted down on the info they get sent from the sonographer.

Dating scans can be out 2 weeks either side!!!! You have to remember that baby is sooo intsy that 1mm can affect your dates a bit so imagine if the sonographer has mismeasured by more than that and how easy would that be to do.

I am sure its all good hunny,.. and I am sure the HB is fine too, maybe you have a little blue brewing in there this time