Question 1

Why is it better to wait until 8 week gestation versus seven weeks gestation in order to have an accurate dating ultrasound?

Accepted Answer

this is inaccurate: ultrasounds are certainly quite sensitive at both 7-8 weeks. Consult your oB- there is no logic in this statement.

Question 2

How accurate are my 7 and 9 week ultrasounds if i got the same due date both times and could it be off 12 days ?

Accepted Answer

The accuracy of a 7 and 9 week ultrasound is within about 3-5 days.

Question 3

How accurate are early ultrasounds?

Accepted Answer

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. If you were to present for your first sono in the third  trimester there can be 3 or more weeks of uncertainty of dates.

Question 4

How accurate are 32 week ultrasounds?

Accepted Answer

On what ?S are being asked.  Best time to date the age of the fetus is 8-13 weeks.  Best time to evaluate the anatomy is 18-22 weeks.

As they get older, there is less accuracy, since all fetuses (like their parents) are different.

Older fetuses are bigger, so it can be easier to see somethings, but it is more likely some part of the fetus will be in the way of what you are trying to look at.

Question 5

How accurate are ultrasounds at 8w1d?

Accepted Answer

The ultrasound is pretty accurate and several throught the pregnancy till be more so

Question 6

Early ultrasounds always accurate? how inaccurate can they be?

Accepted Answer

The early ultrasounds are the most accurate. They should not be considered inaccurate in any way.

Question 7

I heard ultrasounds at 5 weeks 6 days are really accurate and can't be off by a week is this true? thanks goodnite

Accepted Answer

Early pregnancy ultrasounds are very accurate, however, 1 week difference from last menstrual  period doesn't appear that major difference.

Question 8

How accurate are 12 week ultrasounds with gender? they were incorrect with my last child so just want to know if they are most likely wrong again?

Accepted Answer

The accuracy will vary depending on the experience of the sonographer and the ability to locate the genital area on ultrasound. In one study: at 12 weeks, when the genital area was successfully visualized, gender identification was correct 92% of the time. At 13 weeks it was correct 98% of the time. **In this study a very experienced physician, not a technician, did the studies.

Question 9

How accurate is a 7 week ultrasound? any room for error?

Accepted Answer

Accurate for what? Determining viability or age of gestation? Regardless no test is '100%'.

Question 10

Can a 5 week ultrasound b mistaken for 6-7 and an 11 week ultrasound b mistaken for 12-13 weeks? or is it rare for both to be off that much? accurate?

Accepted Answer

Properly performed and interpreted ultrasound examinations have a variability of 8% plus or minus the measured dating.

Us is most accurate when measuring the crown rump length (crl) of the fetus, at between 8 and 13 weeks.

Ultrasound dating at 11 weeks 0 days should have a 95% confidence range of 10 weeks 1 day to 11 weeks 6 days which is +/- 8%.

How accurate are ultrasounds at 7 weeks

Why is it better to wait until 8 week gestation versus seven weeks gestation in order to have an accurate dating ultrasound?

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How accurate are my 7 and 9 week ultrasounds if i got the same due date both times and could it be off 12 days ?

How accurate are early ultrasounds?

How accurate are 32 week ultrasounds?

How accurate are ultrasounds at 8w1d?

Early ultrasounds always accurate? how inaccurate can they be?

I heard ultrasounds at 5 weeks 6 days are really accurate and can't be off by a week is this true? thanks goodnite

How accurate are 12 week ultrasounds with gender? they were incorrect with my last child so just want to know if they are most likely wrong again?

How accurate is a 7 week ultrasound? any room for error?

Can a 5 week ultrasound b mistaken for 6-7 and an 11 week ultrasound b mistaken for 12-13 weeks? or is it rare for both to be off that much? accurate?

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