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1st Trimester
Just had dating U/S - math doesn't add up - advice pls
They say I am measuring a week and a day earlier than I think I am and if this is the case than there is no medically possible way that an egg was fertilized to make this baby, sperm would have had to live about 14 days (we were not actively ttc so we only had sex once two days after my period and once two days before my next period was expected)
Is there any other reason that the baby could be measuring a whole week and a day earlier than we thought? I thought I was 7w2d and she said I am 6w1d acording to measurments. She (the tech) said they will change my due date based on this and I don't have another check up until june 3rd to talk to my dr about it.
I must have looked worried because she also said everything else looked healthy for a 6w baby heart measured right and was there beating away. (thank god for that)
what else could this mean? wwyd? any advice welcome
This discussion has been closed.
Re: Just had dating U/S - math doesn't add up - advice pls
At my first u/s, my RE thought I would be 7 weeks 4 days. I was only about 5 weeks 1 day. Every other u/s showed that everything was looking great! I hope you continue to have a healthy baby!
This happened to me with 2/3 of my mc's. I really hope this is not the case for you...GL
To be honest, I wouldn't be that concerned over it yet. If everything else looks healthy, chances are everything is fine.
You will have another u/s at 20 weeks, and possibly another one before that. They will then be able to give you more accurate estimations.
I was orginally measuring behind by 2 weeks, but by the time I had my 12 week u/s, everything was back on track.
Good Luck!
A kiss he will never forget- Disney World 2014
Yes, it's me....
2 thoughts don't freak out about the blood test. If you look up normal ranges for dpo they are HUGE ranges! Also as pp said, you could have implanted late...I am pretty sure the clock doesn't start ticking w/ measurement until implantation so perhaps that is the explanation? I think the time it takes for implantation can also varry greatly.
Try not to stress (easier said than done I know)
Luv ya and if you aren't doing this alone niether am I! So hold tight to that apple seed and let's do this!
When you figure there is a small margin of error to begin with and adding in the possibility that you o'd a day later than you thought, it implanted late, it's hard to measure crl when there's not a crown or a rump, etc etc etc, it's all possible.
Don't worry about your day and be happy you have a healthy 6 week baby with a hb
He's the single greatest thing I've done in my life and reminds me daily of how fun (and funny) life can be. He's turned out pretty swell for having such a heartless and evil mother.
First trimester u/s are the most accurate u/s you can get throughout your pregnancy. The further you are along, the more likely that measurements can be off. At this stage of the pregnancy, unless the tech/doctor is a complete idiot, then it is a pretty accurate science.
My dr told me that even in early pregnancy, u/s can be up to a week off. So yes, it could be a week off and still be a viable pregnancy.
When I conceived my DS, I charted so I knew exactly the day I ovulated. At my 1st ultrasound, baby measured 5 days ahead then what I thought.
OK so for those of you still following along, thank you.
March 29th - the 1st day of last period (April 4th was last day)
April 6th - had sex
April 12th - day my math has me concieving (day 14) give or take
April 20th - Day I would have had to concieved acording to the O/S tech's new due date of 1.11.01 give or take
April 24th - had sex
April 28th - BFP - very clear/dark on a pink two line test
May6th - blood test to confirm - nurse who read said hormone levels match the 5.5 weeks pregnant I thought I was then
May 19th - Ultra sound - measures 6w1d (should have been 7w2d)
There just wasn't sperm there to fertilize an egg if I ovulated late. It would have had to live 14 days or so and I'm pretty sure that isn't possible. My period or sex dates could have been off a day maybe two but not a whole week it just isn't possible. According to the new math I would have had to have my period the 6th when I was having sex and we don't do that so I know its not right. I was not charting so I don't know when I ovulated for sure I just know that if I did when they say I did, the egg could not have gotten fertilized. I am gonna call the doctor at my lunch but right now I have students (who yes I am ignoring while they work and I type) so I can't do anything but consult the bump's experts.
p.s. I have never had any indication that I am in anyway "high risk" I am blessed with a 23mo daughter with a complication free pregnancy and we got pregnant with her the first time we tried. and although we weren't ttc this baby we did get pregnant the first time we had unprotected sex, even in a time I thought we were fairly safe (2 days after period was over).
I'm sorry. I didn't want to read for the fourth time and then not reply.
There are a variety of possibilities - from the tech's experience to a tilted uterus, to an u/s measurement that's off just by milimeters, to a pretty average 5 day give and take in terms of measurements.
For me, my story did not have a happy ending. In January, I went in at 7w1d. Baby measured 6w1d with a heartrate. We didn't get the exact speed of the hr, but it was over 100. Because the baby was measuring behind, I went in 4 days later at 6w5d for a follow-up u/s. Baby was measuring 5w7d and the heartbeat had ceased. I had a medically managed miscarriage over the next three days.
There is a chance you could be OK. Some babies are slow starters, babies grow in spurts and fits (just like regular humans, you know?), uteruses are tilted, techs have bad eyes - there are all sorts of explanations I can give you to make you feel better. Unfortunately, at this point, you're just going to have to wait for a follow-up ultrasound. If you don't have one scheduled, please demand one.
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If their numbers are right then that means that you got a BFP on 8 DPO. I don't think that you ovulated late. This has happened to me twice, and both ended in miscarriages. While early ultrasounds are very accurate, I do believe that there is variability in the quality of the US tech. Keep your hopes up....there are lots of stories like this that turn out positive.