Doctor insights on:
What Is The Margin Of Error At Dating Scan
Are ultrasounds done at 13 weeks pregnant accurate? What is the margin error of dating scans performed at this stage of the pregnancy?
Yes, fairly accurate: The margin of error on a dating scan at 13 weeks is approximately 7 days. ...Read more
Varies: The range of error for an ultrasound at that point would likely be around +/- 8 days. ...Read more
What's the error of margin for u/s dating at 11w4days on 01/20/14 with edd of 8/08/14 as far as conception date? Is 11/25/13 eliminated from conception
You should be: Discussing all of this with your OB since your OB should answer any dating questions you have any any? S about conception date with that us conception would be 11/15 as your OB could have figured out, us should be acurrate + or - 3-4 days but ask your OB what their range is. ...Read more
What is the error of margin for an ultrasound dating at 11 week 4 day, measuring the fetus crl at 4.8 cm?
Plus or minus, 5 day: The margin of error at that gestational age is typically + or minus 5 days. That crl is definitely normal for that gestational age. ...Read more
Ultrasound dating accuracy? An ultrasound at 13 weeks and 3 days would have how many days error tops?
Depends: Assuming the tech measured accurately, probably not more than 3 days. ...Read more
My dating scan 2 weeks ago showed gest sac =5w1d. No fhr. Today scan showed crl 4.4mm =6w1d, sac 13.4mm, fhr 112. Is this reassuring? Need f/ u scan?
Everything: Sounds encouraging and the embryo is growing. Consult with your obstetrician about the need and timing of future ultrasounds. ...Read more
My dating scan 1st August 2014 dated me 12w 5days who is the dad? The one on the 20th april or the second on the 29th april til middle of may?
Second one: Thirteen weeks is a trimester, or 91 days, which puts your date if conception around the 3rd of May. Since there is an error factor of +/- 5d - 2weeks, you will probably need to do paternity testing, since within this error factor, either one could be the dad, within the error if the testing technique. Dad #2 is the front runner in this calculation, but can't rule out #1 by dates alone ...Read more
I had a dating scan yesterday I am 4w3d. I didn't feel nauseous that much and my nips still are sensitive but not as much can symptoms come and go?
Yes: Absolutely! It's early, so symptoms will wax and wane for a couple of weeks then set in. Every woman's experience is different ...Read more
How accurate is a dating scan saying im 9 weeks. Had 2 a week and a half apart and both said same things. 1st-due date jan 27th other, jan 26th 2016.
Ultrasound: Dating is generally accurate by +/- 8% in days, so at 9 weeks it is accurate to approximately +/- 5 days. ...Read more
Lmp was 16th april does this mean I definitely ovulated on the 30th april. Or should I go by dating scan saying lmp 22nd may & ovulation 6th may.
Dating sono: A carefully done sono is accurate especially first trimester. ...Read more
Lmp was 16 apr so does that mean I ovulated on the 30 apr. Or should I go by lmp dating scan at 9wks saying my lmp was 22nd apr making ovulation 6 may?
First one: Your initial LMP date sounds pretty accurate. Stick with it. ...Read more
Very: It has a 5-7 day margin of error. It is quite accurate. ...Read more
Can 12 week dating scan be off by 2 weeks? Could a 10 week gestational age fetus measure as big as 5.6cm?
Wouldn't a fetus at a 14 week dating scan be seen if it was bigger or smaller be detected in determining due date?
Being pregnant: At fourteen weeks, if a female was pregnant, a fetus would be observable. ...Read more
How accurate are early dating scans mine came back 6weeks 5days due 23 October and my LMP was on 13/1/14 due date 20th October?
Conception: Early scans are the most accurate and most used way to determine conception and due dates. You can verify all you need to know about your pregnancy yourself on the internet. The tools are readily available. Your baby was conceived on 1/30/2014 from sex that occurred 1/25/2014 to 1/30/2014. You can verify this here: http://www. Babymed. Com/conception-calculator. ...Read more
20 week anatomy scan gave due date 3 days earlier than dating scan done at 9 weeks. Which due date should I go by? Are they both wrong?
The ultrasound: A second trimester US is much less reliable than a first trimester one. In this case, they are very consistent which makes your dating very reliable. Go with the 9 week ultrasound date. You did not mention your LMP, but if it is also consistent with the 9 week sono, that makes your dates even more reliable. ...Read more
Does everyone ovulate on day 14? Is this why my dating scan changed my lmp 7 days later than it was? Because I didn't ovulate on day 14??
Dating sono: A first trimester dating sono should confirm your due date by LMP within a week. Not everyone ovulates on day 14. ...Read more
Why did my 9 week scan change my lmp date? Did I ovulate late. Is that what happend? Is dating scan at 9 weeks accurate to find ovulation?
Scan likely accurate: A 9 week scan should be accurate at getting our best idea of a due date, although it is within normal range to deliver anytime between 37 and 41 weeks....so even our best guess isn't that "accurate". And yes, if the scan made your due date later, then you likely ovulated later. Ovulation time can vary even with fairly regular periods. ...Read more
Which male could be the dad. 20th april or beginning of may as dating scan dated from 3rd may but baby was born 4th feb 4 day early from EDD?
Either guy could be: From April 20 to May 3 is 2 weeks, which can be too close to call. It doesn't matter when the baby is born, if the original dating ultrasound was within the reliable dating time earlier in pregnancy. One can do this the old-fashioned way, meaning the father is the guy the woman married... and live happily ever after. Or, if one must know exactly, one can just save up for the cost of the DNA tests. ...Read more
If my dating scan gave me the due date 21st September is there any way at all I conceived on the 9th jan or after? Could it be out that much?
Very probable: Ultrasound scans have a plus/minus error of two weeks, however your dates line up for that conception date with a EDC of 9/21/16. ...Read more
Will dating scan at 9 weeks give a later lmp than actual lmp if I ovulated later than day 14?? Should I use dating scan to find ovulation date?
Should I go by lmp or dating scan at 9 weeks? Dating scan changed lmp date to 6 days later than it actually was. Is this because I ovulated late?
That's the same date: In pregnancy dating, all dates for natural pregnancies are estimates (plus or minus a week). That means 6 days earlier than a presumed date, or the presumed date, or 6 days after the presumed date, ARE ALL THE SAME DATE. That's how it works. They are the same day. But, if a woman only had sex ONE time, she knows her conception was likely 1-5 days after that. Dating scan at 9 weeks is accurate. ...Read more
No worries: The date provided for your Lmp will be correlated to the estimated date by ultrasound and based on how close those two dates are will determine your expected due date. Best wishes ...Read more
Dating scan: Will clarify your expected due dateGet a more detailed answer ›
Get a preg wheel: I give them to my OB pts if they want one, once u have a wheel it is easy. ...Read more
Yes and no: We don't date pregnancies from date of conception but in a sense we do make that assumption. ...Read more
Yes: The earlier the dating scan. The more accurate the date of delivery. ...Read more
Why did dating scan change lmp by 7 days. Which should I go by? I want to find when I ovulated to find paternity.
Merely estimates: In pregnancy dating, all dates for natural pregnancies are estimates (plus or minus 1 week). That means 7 days earlier than a presumed date, or the presumed date, or 7 days after the presumed date, ARE ALL THE SAME DATE. That's how it works. But, if a woman only had sex ONE time, she knows her conception was likely 1-5 days after that. Dating merely estimates conception within a 2-week window. ...Read more
- Talk to a doctor online
- What is the margin of error for due dates based on early ultrasound?
- What do docs use to scrub lid margins for blepharitis?
- Endocervical margin
- Refractive error
- Error ultrasound
- Ultrasound errors
- What does truncation of the apical free margin of the lateral meniscal body mean this mri was done after having surgery?
- What does subtle fibrillation along the undersurgace and apical free margin of the posterior horn of the lateral meniscus mean?
- Margin of error at 9 weeks ultrasound