Dating question

iVillage Member
Registered: 04-19-2011
Dating question
Sun, 07-17-2011 - 5:40pm

When I went to my first OB appt, I thought I was 7w5d but the Dr said I was measuring 7w4d so I was off by 1 day.

iVillage Member
Registered: 07-23-2009
Sun, 07-17-2011 - 5:48pm

A few days isnt really a big deal. 1 day is great. U/S can be off by a few days. My baby girl been measuring 3-7 days ahead for the whole pregnancy and is doing great.. :)


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iVillage Member
Registered: 12-06-2006
Sun, 07-17-2011 - 7:22pm
Sounds like GREAT appointment to me :)

Due dates are figured on a standard 28 day cycle with ovulation on day 14- then it takes anywhere from 7-12 days for a baby to implant. So if you don't have a textbook cycle and ovulate early or later, the dates will be off the predicted ones. Also if baby implanted early or later makes a difference-- all healthy variations :)

iVillage Member
Registered: 04-13-2010
Sun, 07-17-2011 - 9:35pm
My doc said early u/s can easily be off by even up to 5 days... mine was. My first u/s I was like 7w2d and measured 6w5d. My last two I've measured exactly right on.

Glad everything looks good so far!!

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iVillage Member
Registered: 03-01-2009
Mon, 07-18-2011 - 1:02pm
As the ladies have said, measurements can vary. I also think there's a certain amount of human error involved in scans where you rely on exact measures but it could be off by a day or two based on who does it. My Baby C is a couple days behind but still within a normal range for where I'm at...basically "normal" varies. I know PAL brain doesn't help. ((hugs))
Photobucket Forever Missing Our Angels ~ May 2010 ~ August 2010 ~ October 2010 
iVillage Member
Registered: 03-02-2007
Mon, 07-18-2011 - 1:24pm
I totally agree with this - I am a late O'er, so I went to see my RE for my first u/s at what should have been 6 weeks, and then my RE reset my due date back several days, making me only 5w4d! So if you O later than a "typical" cycle, your u/s dates will be off. I don't think it's a big deal.
Kelly, mom to 4 year old Lexi, wife to Rob TTC Number 2 since April 2010, with a loss in June 2010 at 4.5 weeks, and a loss in April 2011 at 8 weeks (possibly ectopic). Saw the RE in May 2011, we were moving forward with testing and an IUI when we