There is a 12 day difference in due dates ultrasound confirms an earlier date and LMP is a later date Which is more accurate?

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I go by the LMP, but even then I had mine early.
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How accurately can an ultrasound determine the date of conception?

Ultrasounds measure the size of the fetus to predict a due date and are usually very accurate, within two weeks, so I would safely assume that it would not be off by five week

How accurate are due dates predicted by ultrasounds?

Answer . 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.

Is it more accurate if your doctor gave you a due date of February 18 and said you were 21 weeks pregnant but an ultrasound showed you were 20 weeks and had a due date of February 25?

Answer . You may have had a longer cycle and become pregnant a little later than you thought. There is only a week between these 2 dates so it is not enough to worry about

Is an ultrasound more accurate in dating of pregnancy especially if you do not know your LMP?

Answer . Yes, During an ultra sound they measure the length of the baby, the limbs if visible, head circumference etc.. then calculate an expected delivery date.\n. \n

How accurate are the ultrasounds for dating a pregnancy?

My wife told her doctor she didn't know when her last mp was, so he sent her for an ultrasound! She lied, we just wanted 2 get an early ultrasound, and it was exact 2 the day

You were told you conceived on one date by an ultrasound but your lmp tells a different story off by 7 days but than again your cycles are 24 days which is more accurate?

Answer . Hello.\n. \nI would go with the date the ultrasound gave you but ultrasound dates can be off by a few to 7 days.. Answer . \nBoth of them are right. \n. \n

How do you figure out the approx date of conception based on your due date your due date is sept 18th your pregnancy is not consistent with your lmp your ultrasound was consistent with your due date?

The closest thought I have would be to go back 40weeks, then forward 2 weeks. This thought is based apon the fact of your aprox due date and taking it back to to what would ha

How accurate is 6 and 12 week sonogram for due date?

When figuring the due date by a sonogram, the doctor will measure the crown-rump length (CRL). The length of the embryo on the longest axis constitutes the crown-rump lengt

How accurate is the ultrasound due date?

In the first 8 or 10 weeks, transvaginal ultrasound is very accurate, usually to within 2 or 3 days. After this time period, it becomes less accurate, varying up to 1 week if

Can a ultrasound be wrong about a due date?

Yes, the ultra sound measures the head and a forearm. Depending on the size is how they come up wth your conception date and due date. Your due date is typically 2 weeks bef
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How accurate is a due date calculator?

Due date calculators are very useful in determining the approximate due date of a baby. Due date calculators use the date of the last menstrual period and calculates out 40 w