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A member asked:
If my 1st&2nd trimester ultrasounds are giving me a conception date of aug 24-28 is it safe to say i concieved around this time or could i have still concieved from a july 27 encounter being off 4week?
2 doctors weighed in across 2 answers
1st trimester u/s: A first trimester ultrasound is very accurate. If your conception date is listed as 8/24-8/28, is is almost impossible for conception to have occurred 7/27.
Answered 1/22/2018
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Unlikely: It is unlikely that with two ultrasounds agreeing on conception date that a 4 week error could be made.
Answered 3/14/2014
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