How accurately does a transvaginal ultrasound rule out pregnancy?

[Crystal357]

How accurate is a transvaginal ultrasound in ruling out pregnancy?  Is there ever a time when ultrasounds are incorrect?

[tiredbuthappy]

normally, it is very accurate. however, i do know of one case where it wasn't.
my friend has an early u/s and it showed she was pregnancy. she went back 2 weeks later for a follow-up and they couldn't find anything on the transvaginal u/s. at that same appointment, they did an abdominal u/s and were able to see the healthy baby. i guess the position in the uterus made it hard for them to see- plus, she has a large fibroid. maybe that was blocking the view?

[diela]

the most accurate compared to HPT and blood test as it cam show you what is going on in there... at 4 weeks, u usually dont see much, at 5 weeks you will a sac and then at 6 weeks u will see fetal pole andheart beat. if you just ovulated and not pregnant, the doc can tell that too as they can see the thickening uterine lining and probably a left over follicle where the eggs got released.

[evthing4reason]

it should be more accurate thena regualr u/s as they can see the cervix, whether it is open or closed. as far as seeing the sac or anything i'm not sure becaused every tv u/s i had was to check my cervix..,..didn't see much of the uterus

[cminamyer]

Not always, I had an tv u/s @ 4 1/2 weeks and they couldn't see the sac yet.  But I agree that by 5 or 5 1/2 you should at least see the sac.

[alaysha]

By 4-5 weeks they would be seeing a sac at least that means that the week and the week after you miss your period you should be able to see something. Ultrasounds are VERY accurate.

[cminamyer]

It depends on how early the u/s was done.  You can't see anything sometimes until 5 or 6 weeks.  That would be about a week two after a missed period.