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A member asked:
How off can 9 week transvaginal ultrasounds be?
A doctor has provided 1 answer
No more than a week: In general, first trimester ultrasounds are accurate within +/- 7 days. Remember, if you are measuring "9 weeks" size, that means you conceived about 7 weeks ago.
Answered 2/13/2014
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Related Questions
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Is it possible to see a sack and a very tiny fetus at 4 weeks and 3 days on a regular ultrasound(not transvaginal)?
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If the baby is unlikely to be alive inside a woman's body, what should she do? She's 8 weeks based on transvaginal ultrasound.
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I went to get an ultrasound and i was 8 weeks and 4 days and the due date is september 28th how accurate are transvaginal ultrasounds on determining ?
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Regular ultrasound said i was too early the transvaginal say i'm 7 weeks and the sac is there but no baby. So am i 7 weeks or least or is it a defect?
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10 weeks transvaginal ultrasound baby heartbeat is 183 what about gender of baby?
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