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What Is The Margin Of Error For Due Dates Based On Early Ultrasound
Is the margin of error in a 1st trim ultrasound based on error of measurements or assigning a due date? I hear diff things about how "off" they can be
Gestational age: It is reported as number of days that gestational age could be off, in days. Assuming that babies all mature similarly (a fairly good assumption within a week or two) this also applies to expected delivery date. You have asked at least 3 questions about this topic. I suggest you read something more definitive such as this http://www. Nlm. Nih. Gov/medlineplus/pregnancy.Html. Read more
An ultraound, also known as a sonogram, is a painless and relatively inexpensive imaging test that utilizes sound waves instead of ionizing radiation. There are no side effects. Ultrasound can give us two-dimensional, and in some applications three-dimensional, images of structures and organs in virtually any part of the body. In addition to diagnostic uses, such as evaluating abnormalities in the abdomen, pelvis, and breast, ultrasounds are commonly used to guide needle and catheter placement in a variety of surgical ...Read more
How accurate are ultrasounds for dating pregnancy what's the margin of error. If my due date is oct 31, what are the dates I could have gotten pregnant?
What year?: It would seem that you would have to conceive on feb. 8, 2014 to give birth on 10/31. If the question is of historical interest, I would need to know when the ultrasound was done. Otherwise, you might want to check the dates you provided. Read more
What changes a due date by 4 days? Original due date was based on LMP only and then changed to 4 days earlier after 12wk ultrasound. U/s this precise?
Same date: A four day difference is mathematically speaking no difference. You are within the margin of error of a sono machine. A due date simply marks the gestational age if 40 weeks. In this case either date is appropriate. You and your doctor can choose which to go by. Ask your doctor why he or she chose one over the other. Read more
LMP: The most accurate way of assessing a person's due date is by providing an accurate date of the last menstrual period. When that is not available then a number of factors can contribute to estimating due date. This includes measurements of the uterus and measurements of the fetus at various locations. Read more
I know it's not a big difference, but what would change a due date from june 3 to may 31? (based on 12 week ultrasound).
Different size is OK: An ultrasound measurement and fetal age calculations are based on averaging many pregnant women and following them until birth of the baby. There are many factors that could alter the growth of the fetus, and babies come in all sizes, so the dates during early pregnancy are reported as a certain date plus or minus 5 days, 10 days, etc. The earlier the ultrasound, the more accurate the dating. Read moreSee 1 more doctor answer
If my due date from multiple early ultrasounds is nov 12, what are the possible dates of conception? Dates jan 19 fall in this range?
No: Conception probably occurred around feb 20.Get a more detailed answer ›
Ultrasound: Dates can be off or wrong. Ultrasound more accurate. Read more
Early ultrasound put me at 6 weeks 6 days. Due date april 26. How possible is conception from july 23-26?
More likely 8/3: That seems a little outside the range of possibility, if your ultrasound is believed to be accurate. In first trimester, ultrasounds are off by as much as +/- 5 days. Thus 5 days back from 8/3 is around 7/29. 7/23-7/26 seems unlikely, then. Hope that helps! 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
Are radiologists the ones that determines due dates from ultrasounds? And this is based on precise measurements?
If my due date measures august 29th with conception december 6, and my baby decides to come early does that mean ultrasound measured wrong or no?
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
Being Pregnant: In reality this is not common or normal. Thus most of us here would defer to your OB to explain this. You are correct. The early ultrasounds are usually the most accurate for dating. There must be a reason and I would direct you to your OB to confirm why this was done in your situation. Read more
Why my Dr change due date from 07/13 to 07/27 after ultrasound 1st date was based off period. Which date is more accurate went from 10wks to 8wks?
My due date may 14 from ultrasound and if I go two weeks early does that change who the father of my baby is? Guy a was aug 3 then aug 8, 12, 15, 21 is b
Hmmm.: Sounds like you just don't know who the father of your baby is. There isn't any way go know with 2 partners in the same time frame. The only way to deal with this is to be honest with everyone. Have your baby and get dna testing. It will be the best thing for you, your baby and the father. And the other guy. Good luck! 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
Hi I had a ultrasound early and they say my due date is august 29th the first day of my LMP was november 18th looking for conception date range thanks?
Early December: Based on your lmp and your due date, your range of probably conception is from dec 2- dec 6, 2012. Read more
Very premature is a condition in which a baby is delivered between 28 and 31 weeks' gestation. Depending on how premature, how sick, and how lucky or unlucky a baby is, he can get brain problems, cerebral palsy, blindness, deafness, developmental problems, learning disabilities, severe lung diseases, infection and loss of some intestines, etc... Babies who are only moderately premature usually ...Read more
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