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If you are in the early stages of pregnancy &-8 weeks it will only be off by a day or two. By twelve weeks may be 3 days, 18/20 weeks 4-5 days. From then on it becomes more difficult as babies end up different sizes. Not at an early stage. Are you further on than you thought or not as far on as you thought? Give a few more details and I can tell you a bit more.

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17y ago

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At 18 and a half weeks pregnant can an ultrasound read at 20 weeks what would be the reason Is the baby big can an ultrasound be off by 10 days?

At this stage, yes the ultrasound can be off by 10 days. Mine was off by ten days the other way, that is I thought I was 18 weeks and the ultrasound said 16 and a half. I knew when I had conceived because my husband had been away on a trip.


Can an ultrasound at fourteen weeks be off by two weeks?

Yes


My ultrasound puts me at 21 weeks preg that would mean I was feeling movement at 14 weeks took cheap home test at 3 weeks now measure 26CM and not sure of LMP could ultrasound be off by 3 or 4 weeks?

my ultrasound said that my last period was nov25 could it be right


Can a ultrasound be ten weeks off if you think your 12 weeks and ultrasound reads your 22 weeks?

Ultrasounds are fairly accurate - a fetus at 12 weeks is very small. A 22 week fetus is fairly large. They measure how big bones are, and the distance around the head. There is no mistaking a 12 weeker for a 22 weeker.


Why are 2 weeks taken off your ultrasound scan age?

Because it's about 12 days of conception


I Should be 7 weeks but ultrasound says 6 could my due date be off?

It is unlikely that they would be that far off. They're often off by a couple of days or weeks, but not usually 1 1/2 months off. I strongly suggest that you speak to your doctor about it for more information.


When did you conceive if your ultrasound says you are fourteen weeks pregnant?

Subtract fourteen weeks (7 days x 14) from the date of the ultrasound.


How many days out could a scan be?

An obstetrical ultrasound can be as much as 1-2 weeks off, before or after the due date.


Can a 3 week old fetus be seen in an ultrasound?

A fetus is generally not visible on ultrasound until about 5-6 weeks of pregnancy. At 3 weeks, the embryo is very small and not typically detectable on ultrasound.


Will an ultrasound show heartbeat if you are 6 weeks pregnant?

You could see a heartbeat if they do a transvaginal ultrasound.


How far along must a woman be to figure out the sex of the baby?

The sex of your baby can be determined by ultrasound at 16 weeks. Doctors will usually do an ultrasound at 20 weeks.


If ultrasound said you were 4.5 weeks pregnant when did you get pregnant?

Around 2.5 weeks ago.