Doctor insights on:
Which Edd Is More Accurate By Lmp Or Ultra Sound
So everyone says early ultrasounds are more accurate then LMP so mine has 4 day difference between edd so should I not go by ultrasound due date ?
Within 4 days is : No real difference. There is nothing magical about either date, except for 2 things: 1. If the lmp is different from the early OB us dating by more than 2 weeks, the lmp is probably wrong. 2. What everyone wants to happen is appropriate interval growth - meaning the fetus grows in size to match the time since the last us - that means growth is happening normally. ...Read moreSee 1 more doctor answer
Is early ultrasound at 8w1d more accurate at predicting conception than LMP? EDD changed going by ultrasound now too...
Possibly: Ultrasound done early is much better than LMP dating for the "Expected date of Delivery." Conception is another issue entirely. Usually conception occurs 2 weeks prior to a missed LMP, but this is ONLY an estimate. Conception dating is not something that is useful in medicine and there is too much variability to do that kind of dating, Unless you are an In Vitro (IVF) pt. Then you know for sure. ...Read more
Had a dating ultrasound i was 14w3d. Couldnt use LMP i was on depo,I wasnt having periods. Can edd be off by 2w3d at 14 week ultrasound.How accurate?
Unlikely: 14 week ultrasound is on the cusp between first and 2nd trimester. First trimester ultrasound usually accurate to 3-5 days. Second trimester accurate to 1-2 weeks. So at 14 weeks I would doubt the dates would be 2w3d off. This would be more likely in the third trimester. ...Read more
Is u/s dating in first trimester more accurate that going by LMP? EDD changed & going by ultrasound now...
Depends: 1st trimester US is accurate within 5-7 days so if it differs from your LMP due date by more than that then the US is used. Also if you are uncertain about your LMP, most OB's will use that early US. ...Read more
What are the chances of my doctors changing my due date if i had an ultra sound done at 6 weeks? Is it very accurate that early?
I had an ultrasound at 8 weeks 4 days Nov 14th, with a due date of june 22nd. My LMP was September 19th.. which date is accurate ultrasound or LMP?
Either date is: Predicting your delivery is not an exact science. If the first day of your last normal period was 9-19 then your estimated delivery date would be 6-26 (plus or minus 10 days) and you were about 8 weeks pregnant when you had your ultrasound on 11-14. Your 8 w 4 d sonogram is quite reliable but a first trimester sonogram has a "margin of accuracy" of 3 to 5 days.Your due date is at the end of June ...Read moreSee 1 more doctor answer
My due date based on a 7w1d ultrasound is Sep. 2nd but my LMP is Aug. 13th. Which due date is more accurate.
Ultrasound: Generally speaking, a first trimester ultrasound is more accurate. If the two dates are within a couple of weeks, generally you keep the LMP dates. However, farther apart than that, you shift to the ultrasound dating because of its increased accuracy.. ...Read more
The doctors determined my due date from an estimated lmp, it was nov4 . Sept 16, i got an ultrasound that read oct25 which date is accurate?
Probably LMP: Did you have a 1st trimester ultrasound? If you did, that would be the most accurate, especially if it was consistent with your LMP. A third trimester ultrasound is less accurate, with an error range of 2-3 weeks. The ultrasound would therefore be consistent with your dates based on your LMP, since there is only a 10 day difference. ...Read more
I am using conception calculators should I use the due date or LMP i had a very early ultrasound at 6 weeks which is more accurate? :)
It depends: If the difference between the two is less than 1 week, use your lmp. If it is more, use the ultrasound dates. ...Read more
How accurate are ultrasounds @ 6 weeks? My due date is august 29th according to ultrasound yesterday my LMP was nov 18 when did i conceive? Please? :)
Very good: Ultrasound gets less accurate as the fetus ages. At this point, dating is pretty accurate. You conceived on or about nov 23rd. ...Read more
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