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.
Well I had an ultrasound at 13 weeks and it was not very accurate. and it will not be able to tell the sex of your baby. Oh by the way, depending on what kind of insurance you have and what hospital you are at you may not get another ultrasound. An ultrasound at 7 weeks is extremely accurate, within 2-3 days. At 13 weeks it will be accurate within about 5 days. It can certainly not be off by a month.
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.
An obstetrical ultrasound can be as much as 1-2 weeks off, before or after the due date.
my ultrasound said that my last period was nov25 could it be right
at 17-18 weeks.
No it is not possible to be 11 weeks instead of 7 weeks pregnant. Ultrasound is reliable for dating within a 2 week error. So it is possible for you to be 4 weeks or 9 weeks but not 11 weeks. However dating is usually based on the last menstrual period unless there hasn't been one.
At 7 weeks it's basically impossible for the ultrasound to be that far off. It's normal to be 3-5 days off max.
Because it's about 12 days of conception
There are so many reasons I hope you will have an ultrasound to find out.
In 3 weeks you can hear the heart beat
An ultrasound can estimate how far along you are
yes not until an ultrasound is done
you should be able to....I heard mine on ultrasound at 7 weeks, then at 9 weeks and again last week at 10 weeks! Maybe the person giving you the ultrasound was not experienced enough to do it!
what if ultrasound doesn't detect a fetus at 5 to 6 weeks?
I think this is what you mean. For example. On 28th December the ultrasound said you were 8 weeks pregnant, then on 25th January it said you were 12 weeks pregnant. This would be accurate to within 4-5 days each time.
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.
At 16 weeks it is 80-90% accurate using an ultrasound
i would go with what the ultrasound says as it is almost 100% accurate.
Yes, ultrasounds are not Perfect for time prediction, they do get close, but are not perfect.
You can tell you are pregnant through ultrasound as early as 4 weeks with a vaginal ultrasound.
Yes you can!
Subtract fourteen weeks (7 days x 14) from the date of the ultrasound.
You can start to hear the babies heartbeat through ultrasound as soon as 6 weeks