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A member asked:
Can a 7 week ultrasound be off 2 weeks? can a 9 week ultrasound be off 2 weeks?
5 doctors weighed in across 2 answers
No: A 7 week ultrasound should only be off by 3-5 days.
Answered 11/27/2021
4.9k views
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Usually not: First trimester ultrasounds are usually accurate to within plus or -5 days. You might consider that the LMP is inaccurate.
Answered 3/9/2015
4.9k views
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Related Questions
A member asked:
Do ultrasounds add two weeks to date back to (or close to) your lmp?
A doctor has provided 1 answer
A member asked:
Do ultrasounds add two weeks & should they theoretically date back to your lmp?On 12/6/13 baby measured 12w4d, crl was 60.9mm.If go back 12w4d should that date to(or close to) my lmp?When was conceptn?
3 doctors weighed in across 2 answers
A member asked:
Is conception usually two weeks after gestational age from ultrasound?
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A member asked:
Last week thursday i had an ultrasound done and they said my ga is 8 weeks 3 days, does this include two weeks prior to conception?
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A member asked:
Do ultrasounds add two preconception weeks when measuring baby? If baby measures 12 w is this supposed to date to LMP or conception?
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