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A member asked:
Lmp on 10/1/12 for 2-3 days. 1st us on 11/24/12- 8 weeks, is there any chance that i had conceived before my lmp on 9/25/12?
4 doctors weighed in across 2 answers
Probably not: Dating a pregnancy from the last menstrual period carries a two week error. The dating criteria in this pregnancy falls within that error. The ultrasound dating criteria are more accurate than the last menstrual period if performed during the first trimester.
Answered 12/31/2014
5.1k views
Probably not: First trimester ultrasounds are accurate +/- 7 days. So, your us showing 8 weeks matches both of your listed lmps but is spot on with your oct date.
Answered 6/1/2013
5.1k views
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