re: LADIES!

Quoting ITS A BOY!!!! =]:“ im private messagine you NOW.!”

hahaha ok

What About Ultrasounds?


An ultrasound can be used to determine your due date if your is last menstrual period is unreliable. Ultrasound due dates are found by obtaining ultrasound images and taking measurements of the baby. The underlying assumption of an ultrasound due date is that there is a statistical correlation between certain ultrasound measurements of the baby and it's gestation. The term "gestation" means how far along is the pregnancy. If we obtain ultrasound measurements in thousands of pregnancies where we know the exact gestation, we can find the average measurement for any given gestation. For example, it is known that for a measurement known as the crown-rump length (CRL), the average is 31 millimeters at 70 days (10 weeks) gestation.
An ultrasound due date reverses this observation to conclude that if a baby's CRL is 31 millimeters, then the pregnancy must be 70 days gestation. If you know the current gestation, you can calculate the due date by subtracting the current gestation from the average length of a pregnancy and adding the result to the date of the ultrasound. For example, if you did an ultrasound on a pregnant woman on June 23, 2002 and found a CRL of 31 millimeters, you would conclude that the pregnancy was 70 days gestation. If you subtract 70 days from 280 days, you get 210 days. If you add 210 days to June 23, 2002 (the date of the ultrasound) you get a due date of January 19, 2003.
Unfortunately , people tend to give a lot more credibility to ultrasound due dates than is warranted. That is, many people assume that if an ultrasound due date is different from their due date based on a last menstrual period, that the ultrasound date is more accurate. However, this isn't necessarily true. Remember that the basic assumption behind an ultrasound due date is that a given measurement corresponds to a given gestation. To put this into the proper perspective, imagine that you're told to figure out when a young child will turn 10 years old and are given the following tools: a tape measure and a pediatrician's growth chart for children. You measure the subject child's height, and consult the growth chart. From the growth chart, you find that children are, on average, the same height as the subject child when they are 5 years and 4 months of age. From this evidence, you conclude that the subject child is currently 5 years and 4 months old. Using simple math, you then calculate that the subject child will turn 10 years old in 4 years and 8 months.

Quoting Dee*Faith&Gavin*[HBC]:“ What About Ultrasounds? An ultrasound can be used to determine your due date if your is last menstrual ... [snip!] ... 4 months old. Using simple math, you then calculate that the subject child will turn 10 years old in 4 years and 8 months.”

thanks girlie

Quoting ITS A BOY!!!! =]:“ thanks girlie”

No prob