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I have had many conflicting ultrasounds. I had the exact opposite problem- the femur length was a week further in gestation than the head or abdomen, and the estimated weight put her a week further along than her femur. What my ultrasound technician told me was to trust in the initial date given by the obgyn when I had my very first ultrasound (I was only 5 weeks at my first appt). The earlier the scan, the less the variation in size. I am 5'1, but with those long legs, I guess our little girl is going to be 6'5 like her daddy!

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โˆ™ 2008-04-29 22:48:26
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Q: In your ultrasound the head circumference and abdominal diameter were the same length but the femur lenght was smaller which is more accurate?
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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 do you get diameter from circumference?

Circumference is Pi x Diameter so do Circumference divided by Pi to get the diameter :)

If you have your circumference how do you find the diameter?

diameter = circumference/pi

How do you find the diameter from the circumference?

Diameter = Circumference/pi

What is the circumference if the diameter is 3?

circumference is Pi, 3.14, times the diameter. If the diameter is 3 then the circumference is 9.42

How do you work out diameter given circumference?

Circumference of a circle = diameter*pi Diameter of a circle = circumference/pi

How do you figure out diameter and circumference?

Circumference is pi times diameter. Diameter is circumference divided by pi. Diameter is twice the radius. Radius is half the diameter.

What is the diameter of a circle if you know its circumference?

circumference=pie x diameter diameter= circumference/pie pie= 3.141592654

What is the diameter of a circle with the circumference of 5?

Circumference = pi*diameter So diameter = circumference/pi = 1.59 units

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The circumference of a circle is 31mi what is it diameter?

Circumference = pi*diameter So diameter = circumference/pi = 9.87 mi

WHats the diameter of a circle with a circumference of?

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