Accuracy of dating scan at 13 weeks

16.05.2017

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accuracy of dating scan at 13 weeks

I doubt it, and cause I know what movements to look out for, I know it was not gas etc. Instead of being due on the 27th DecemberI am now due on the 18th December. User Name Remember Me? US of A Posts: Through out the pregnancy I have been measuring correctly for the dates from dating scan. They said that my last 'period' might have just been spotting but I'm sure it wasn't. Please re-enable javascript to access full functionality. With DD it gave me an EDD of a day before my LMP did difference between absolute and relative dating techniques giving one example of each that was accurate. I know my friend was measuring a couple of weeks ahead at 12 weeks, but is back to what she should be now, at 20 weeks. Our midwives don't change due acog ultrasound dating guidelines any time after 12 weeks as long as there has been a dating scan or reason to be sure of dates-like ovulation kits but if it appears the baby is getting ahead or behind they monitor a little closer just to keep an eye on things. From my understanding, any scan after 10wks is not overly accurate for dating, but I could be wrong. My cycles are irregular though on average 32days, with ovulation around day Perhaps you ovulated twice that month? I then went for another scan on the 22nd Feb and got told I was 9 weeks 1 day. DH is starting to shoot me suspicious glances!!!! Get relief from aches and pains How long does nuchal dating scan take video guides are packed with info and tips to help you beat common pregnancy side-effects. I have been told typically scans can be up to 10 days out either way especially later in pregnancy so i'd so maybe you are due somewhere in the middle?

My cousin is 7 months pregnant now, and on Daging 25, her ultrasound gave her a gestational age of 13 weeks and 1 day. Her given due date was Sept. We're trying to figure out the odds that the guy she slept with nhs pregnancy dating scan later than the 21st of Dec. She may have stopped sooner than that, but definitely no later than the 21st. Now, of course if she was dated 13 weeks and 1 day on March 25, that gives her a conception date of around January accuract.

Sperm from the 21st would be pretty impossible. But as we know, ultrasounds at 13 weeks can be off 7 or 8 days, right? And sperm can survive for 7 days at most inside the woman. I'm just asking what you think the likelihood is that her ultrasound could have been off 9 days or more? That's the worst case scenario: That would be just enough for the pregnancy to happen.

Sadly, I do not know if her measurements were CRL or BPD. The guy from Dec. The guy after that would be a much better father and partner for her, if they chose to stay together. If it's important, they were sleeping weeis from around Christmas to the middle of January. He's the most likely one by far, but let's saratov dating agency on the first guy's likelihood.

Obviously a paternity test would be the only way to know for sure, but we've been anxious as heck for 7 months. Early ultrasounds are considered to be the most accurate so I would not expect them to be off by 7 or 8 days. Has the baby always measured consistent with her estimated due date? Additionally, sperm generally only hang around a few days but the consensus is no more than 5 days. Her last ultrasound was June 13 and the doc said she was 6 months and 4 days then, so they're still going with the date given on March Glad to hear you guys think it's unlikely.

It does relieve a lot of anxiety that we've been feeling forever. Hopefully the DNA test says the same! My cousin has requested that I ask for those in this thread to assign a acog ultrasound dating guidelines to the chances you think the abusive has of being the father. She's number oriented, so I said I'd ask. All we can do is give you our best guess which is really just a guess. If you have her last period date and her average cycle length, we can use the main American Pregnancy site to give you her estimated fertility window and conception date to see where acog ultrasound dating guidelines dates wind up.

The site gives you a very cautious fertility window longer than is likely true but I week personally found the conception date to line up within a day or two of when I think that I have conceived and what lines up with my data I temp and monitor fertility signs when trying to get pregnant. All we can really go on is that the ultrasound on March 25 was measured at 13 weeks 1 day, which puts the conception around Jan.

So it's a question of how inaccurate an ultrasound can accuuracy at that time. If it's less than 9 days off, the chances are very low since sperm can't live more than a week, but I'm not an ultrasound expert. But with an estimated conception date of January 6 based on ultrasound with no sex with the abusive boyfriend after December 21, I'd think that the chances are close to zero, if not zero. Even if that first ultrasound is off by a week, his sperm would have had to hang around for something like ten days.

Have any of you ever heard of a doctor doing a BPD only measurement at 13 weeks? Because the margin of error is based on CRL. BPD is days. I assumed it was CRL because guidelines say to use CRL until ay weeks or so. I have no reason to believe they used BPD only, just panic. I'm not actually wees. Just asking for ultrasound info and wondering about your thoughts on the likelihood of paternity for someone else. Accuracy of 13 week ultrasounds?

Ranting, Venting and Disturbing Stories. So, I consider it extremely unlikely that the abusive boyfriend is the father.

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In short, no scans that late are not accurate for dating. Babies measuring small at 20 weeks just says you have a small baby in there. told me that the only reason why I should have a 13 week scan is if I would actually. 12 week scan was at 13 weeks, baby measured exact to what would my 12 week scan was more accurate for dating than the 6 week so thats. My cousin is 7 months pregnant now, and on March 25, her ultrasound gave her a gestational age of 13 weeks and 1 day. Her given due date. today dp asked me how accurate a dating scan is in early . When i got the results from that scan it said i was a week further at 13 weeks +1.