More measurements in the second trimester should be carrried dating in scan transverse plane using the technique of lmp et al before 5 weeks is, scan study accurate that adult mice who were exposed to doses similar to ultrasound had a accurate percent reduction in the rate than cell division. First child lmp date was 26/12, ultrasound date was 19/12, he was born 20/12, so ultrasound was more accurate second child lmp date was 12/1, ultrasound date was 18/1, she was born 13/1, so lmp date was more accurate. Which due dates are more accurate - scan dates or lmp date - posted in pregnancy: tips, questions and information: hi - i was just wondering what others think in relation to due dates. Yes scans include the two weeks when not actually pregnant this was the old way to measure when scans were not available from lmp so your 40 week due date is 38 weeks from conception hope that helps. How accurate is an ultrasound scan for dating a pregnancy school have not so, though, later scans at babble 2 weeks pregnant this will provide a dating scan accurate measurements when her baby measuring a few posts, check in pregnancy, no scans not been able to diagnose potential how accurate as the dating scan says.
Hi all so i am pregnant again and over the moon, but it came as a bit of a surprise so i am not sure of when my lmp was since we already have 2 little sprockets our alone time is few and far between so i know the exact date of conception, however the date's of conception do not equal the date's of the dating ultrasound. Is a dating scan accurate the scan is primarily used to predict your due date and is more accurate than other methods you may have already estimated your due date from the first day of your your last menstrual period (lmp) - this is even though you don't actually conceive until 14 days after your lmp, or later than this if your cycle is longer than 28 days. Dating based on this research is most accurate is the first post on the last menstrual period input any or date if the last menstrual period how accurate ultrasound compared to your adjusted lmp date calculations.
My ob said scan dates are more accurate than lmp dates, and the earlier the scan the more accurate the date -- ie if you have 2 scans whose dates disagree, go with the earlier scan back to top. Doctors give trusted, helpful answers on causes, diagnosis, symptoms, treatment, and more: dr barton on what is more accurate to measure pregnancy lmp or ultrasound: the dating is accurate to about a week as long as the sonographer can see the baby early on the due date though is really variable. If you have a scan during the first 12 weeks of your pregnancy, they are usually very accurate in determining the age of the fetus - my doctor said +/- 3 days if your scan date differs from your lmp, it's likely the scan date is correct and you didn't ovulate at exactly day 14. The most accurate: the earlier you get your first ultrasound, the more accurate is the estimate of your due date and the age of the pregnancy during the first trimester, the dates are within about a week of the actual conception date later in the second trimester, you can be at least 2 weeks off. Conception date is hard to figure without knowing your cycle but the scans are pretty accurate but they can be off you'll know more as your pregnancy progresses and they start to measure your uterus they will use your lmp, the scan and the measurements later in pregnancy to determine your estimated due date.
As for your question - my lmp date would have put my due date as may 21st, and the scan put it as may 27th as it is, he came on may 19th i don't think either are accurate - not every baby cooks for the exact same length of time. How accurate is a 12 week dating scan on the nhs thanks update: my due date by my dating scan which i had at twelve weeks said due date is 27th may 08 and i was 12weeks and 3days i know the baby will come when hes readys, just wondered how accurate +/- days a dating scan is in the first trimester. Scan was correct as with lmp i ovulated very late in the month was only off the pullout a month a fell pregnant eleanor i was given 2 dates one at 8 weeks at a dating scan and one at my anatomy scan at 12 weeks both were wrong she ended up coming 5 days early. Lmp due date or dating scan due date whats more accurate discussion in 'pregnancy - third trimester' started by mrstangoman1, jul 26, 2010.
The dating scan is considered more accurate as not everyone has the standard 28 day cycle that due dates are based on the initial dating scan is the most accurate i've heard of some people's due dates being changed after their anatomy scan due to the size of the baby, but i think most doctor's and midwives use the dating scan. Is a dating scan accurate the scan's main purpose is to work out accurately how many weeks pregnant you are and estimate your due date you may have calculated the length of your pregnancy from the first day of your last menstrual period (lmp) this is even though you don't actually conceive until 14 days after your lmp, or later than this if your cycle is longer than 28 days. Your scan date will be more accurate than your lmp date your lmp presumes you have a 28 day cycle and ovulate on day 14 which just isn't the case for everyone i would recommend booking your nuchal scan according to your dating scan edd.
Which ultrasound due date would be more accurate ekn_4eva due december 8 (boy) 3 kids australia 7 posts oct 10th '11 i had my 1st ultrasound at 6 weeks and 2days and it gave me the 28th of dec as my due date. Our dating scan was more a reassurance scan due to m/c earlier this year we thought that we were 6w4d and it turned out we were 10w 4d that was a surprise and a very welcomed relief. Does a dating scan measure from conception or lmp uk i know that the doctor measures your pregnancy from your lmp for example if your 7 weeks pregnant your actually only 5 weeks pregnant.
Early scan are not always accurate which is why the dating scan is at roughly 12 weeks, there has been a lot of ladies recently that have worried at an early scan to find at the 12 week one baby has caught up or even overtaken the dates they thought. Thus, due to these reasons, d predicted date via lmp is at times not very accurate during d usg scan, d actual position and size of d foetus is measured & then d edd is calculated, based on a long-term established data-base & mathematical formula. How accurate are dating scans (28 posts) add message | report the sonographers explained that the earlier the scan the more accurate as the embryo has very standard development i had one embryo with fetal pole and heartbeat and one blighted ovum dating scans are more accurate than lmp, as you can ovulate any time in cycle. I had a dating scan at 8 weeks and they chose april 16 as my due date but based on last missed period it would be april 20 baby is a little bit ahead by a couple days but said most accurate is 8 week scan because at that point an embryo has finite milestones where as a fetus has average milestones so i would go with dating scan if you had one.
Yes: you can get a more accurate due date with a dating ultrasound, which typically happens at one of your first pregnancy appointments since embryos grow at a very predictable rate, an early ultrasound is a highly accurate way of measuring how many weeks pregnant you truly are if your lmp-estimated due date is very different from your dating scan-estimated due date, your doctor may express concern. For your lmp date to actually be accurate you would have to have ovulated exactly on day 14 of your cycle, which would be a 28 day (give or take a day) cycle if your cycle varies from this, for example my first pregnancy i had a 44 day cycle, then lmp date is off. For me it was accurate (i was using opks due to irregular periods) and my dating scan came in exactly where i thought it would the place i go to says up until 12 weeks, the accuracy is between 3-5 days.