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How accurate is a transvaginal ultrasound at 6 weeks in determining conception dates?
An ultrasound does not determine the date of conception it compares the size of your baby with the size of other babies at the same stage of pregnancy. It said my first was smaller than I expected, about a week out, but he was born on the date the scan suggested weighing over 8 pounds. With my second (twins) it was spot on, they were born 4 weeks early, one of average weight and the other rather small. with an ultrasound it determines your due date due to the size. go to your last period, and minus 2 weeks. say you are due on the 30. minus 7 days, which should be the beginning of your last period. since your last period, on the first day is 2 weeks from ovulation, minus 14 days. now the day is the 9th. 5 days before and sometimes 1 day after is when you are fertile. that is your conception area. 30rd - 7days = 23rd - 14 days = 9th. this is the day you ovulated. From the 5th to the 10th you were fertile.
What else can I help you with?
Judging by an ultrasound at 8 weeks im due on March 14 which means i concevied on June 21. how accurate is the conception date i was with someone on June 14 and then with someone else the 17-22?
your conception date should be pretty accurate considering u had an ultrasound. you shouldv'e been ovulating around June 21st.
How accurate is the ultrasound due date?
They are accurate within 2 or 3 days. But this does not mean that you will have the baby on your due date. Babies can be born any time between 37 and 42 weeks. That is what midwives are taught anyway. With my first my ultrasound said I was due 10 days after my period date but my husband had been away on a trip form the day after conception! Second time around the ultrasound agreed completely, and showed twins. (now 16) == Your last known period date or the date of conception is a better predictor....as all babies are different & you may have an extrememly large or an extremely small baby for it's gestational age, and when compared against babies in the "norm" the due date could be way off.
When it says that an ultrasound is most accurate at 12 weeks does that mean gestational age or the time since LMP?
The earlier it is the more accurate it is whether from conception or from LMP, but if you say 12 weeks you mean from LMP.
Is the EDD given to you on your scan date from your LMP or by the date of conception?
EDD is ESTIMATED. If done by scan is 38 weeks from conception. An EDD is based on the LMP (last menstrual period) and not the date of conception. The ultrasound measurements are comparing the baby to the expected size of other babies at the same gestational age. The earlier the ultrasound is done in the pregnancy, the more accurate it will be. Hope this helps! Dr. B.
If an ultrasound showed you were 19 weeks 2 days pregnant can you count back to see when you conceived?
Ultrasound gives an estimate of the age of the foetus. At this stage of the pregnancy, it's quite accurate, but it's still only an estimate, and the date of conception could be a few days, even a week, away from the date 19 weeks and 2 days ago.
Can your conception date change if you give birth after due date?
A conception date can never be 100% accurate
Is an ultrasound in the 4-6th week of pregnancy the most accurate?
You ussally dont get a ultrasound till 4 mounths
Can a ultrasound be accurate if its saying im now due 3 weeks later then they determined?
Can a ultrasound be accurate if its saying im now due 3 weeks later then they determined?
Is measuring the femur bone in an ultrasound an accurate way to give you an estimated time of conception?
The best person to ask is the person doing the ultrasound. Having said that here are a few guidelines. Ultrasounds can give you a fairly accurate time for the length of the pregnancy. Before 10 weeks the measurement taken is crown-rump length, from the top of the head to the bottom of the spine. This is accurate to within 3-4 days. After about 12 weeks several measurements are taken, head circumference, head diameter and abdominal diameter as well as femur length and the results are plotted on a graph to compare with the estimated length of pregnancy. The earlier the measurements are taken the more accurate they are in assessing the length of the pregnancy.
How accurate is an ultrasound taken at 9 weeks 6 days you want to know your day of conception you have always have regular babies of 7 pounds and do not have any medical problems?
The answer depends on the study itself. As your ultrasonographer or OBGYN provider what the range of error is on the study.
Can your last menstrual period show twenty three weeks but your ultrasound show twenty seven weeks which is more accurate?
ultrasound is more accurate. Measurments of the fetus are made during ultasound that give a more accurate gestational age
How true can ultrasound results be when telling an embryo's stage?
Ultrasound results are typically very accurate in determining an embryo's stage during pregnancy. This is because ultrasound technology provides detailed images of the developing embryo, allowing healthcare professionals to assess its growth and development with precision. However, there may be some margin of error, and it is important to follow up with additional ultrasounds to track the embryo's progress.
