Have
you ever encountered any of these situations?
©
Your
baby
gestational age measured by ultrasound not correlates with gestational
age
calculated by your last menstrual period?
©
Your
expected dates of delivery vary every time you do the ultrasound scan?
Owh
no!! How I’m going to plan my delivery if the dates
vary????!!
Calm
down and take a deep breath. Read this carefully
before you start panicking others…
Usually
it is still considered to be normal measurement
or correlates to the actual dates/age if the difference;
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3-5
days
if ultrasound scan is performed during 1st
trimester
©
14
days if
ultrasound scan is performed during 2nd
trimester
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21
days if
ultrasound scan is performed during 3rd
trimester
Ultrasounds
are not
completely accurate at estimating the due date of the pregnancy. There
are
several reasons why this difference happens;
©
Fetuses
can bend and stretch so the
measurements will not be exactly the same
©
There
is always normal biological variation
between different fetuses
©
The
accuracy of the measurements also depends
on the skill of the sonographer and the quality of the equipment
If
yours still within the range so no need to worry so
much. As long as the other important parameters are also within normal
range,
your baby will grow up well.