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Yes it can be off, they usually are within about 2 weeks of the due date, it is just a round about date that they give, but usually they just tell you when they think the baby is processing too. So maybe when they do the one at 20 weeks, they will let ya know if it has changed....Good Luck Darlin!! :)
To elaborate on the previous response a little more...when the doctor or technician tells you that you are 14 weeks, the fetus is actually around 12, if they tell you that you are 12 weeks, 3 days pregnant, then the fetus is 10 weeks, 3 days. It is too difficult to determine the actual date of conception based on the first day of your last period so they typically round up 2 weeks to make it even...it's sort of goofy but based on your question I'd say your second U/S was showing you only 4 days different from your first...I imagine your U/S was giving a fetal age of 14 weeks and the LMP was more of the 2 weeks different date around 16 weeks...only it was 4 days different...make sense? :) Best of luck!
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How do people use sound?
People use sound waves in ultrasound scans when women are pregnant. You can hear the noises the baby is making and the sound is through sound waves
What does ultrasound feel like?
Ultrasound is a high frequency sound that can penetrate through certain mediums.E.g. One can check if they are pregnant using ultrasound.I did it and felt nothing! so no worries!
Described one medical use of ultra sound?
One medical use of an ultrasound is for a pregnant mother to see her baby.
Which is better ultrasound or infra sound?
Ultrasound
How does a pelvic ultrasound with an full bladder feels like?
Ultrasound is a high frequency sound that can penetrate through certain mediums.E.g. One can check if they are pregnant using ultrasound.I did it and felt nothing! so no worries!
When they do a sonogram can they know exactly when you got pregnant?
If the ultrasound is done in the first weeks of pregnancy it is possible to date the embryo within a few days, an ultra sound done later is not as accurate for dating purposes.
What are the chances of a pregnancy ultrasound being wrong?
There is only a 1% change of a pregnancy ultrasound being wrong. If you've taken a pregnancy test and then go in for an ultra sound to confirm the pregnancy, chances are you are definitely pregnant.
Why should you use ultrasound instaid of audio sound?
because ultrasound is more safer than audible sound.
Is sound below 20hz called ultrasound?
Sound below 20Hz is considered infrasound, while ultrasound typically refers to sound frequencies above the human hearing range (above 20kHz).
If you take a pregnancy test and it said you were not pregnant should you take an ultrasound?
was it a pregnancy test at the hospital or at home if at home get the ultra sound if at the hospital don't bother
What medical technique used sound wave pulses and their reflections to map structures and organs inside the body?
Ultra Sound
How much does an ultra sound tech make?
An Ultrasound Technician is a operator of medical devices using ultrasound, an extremely high frequency wave, to produce images of a patients body. They usually deal with pregnant women to monitor her fetus' development, although there are many other uses.
