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A member asked:
If ultrasound shows me at 5 weeks pregnant today when did i conceive. unknown lmp?
3 doctors weighed in across 2 answers
3 weeks ago: The pregnancy is dated from first day of your LMP, whether from your memory (surprisingly, this is often the most accurate dating method), or calculated from a first trimester ultrasound. Conception is assumed to have occurred 2 weeks after the first day of the LMP. So date of conception was most likely 3 weeks ago.
Answered 8/12/2015
2.4k views
Guesstimate only: The ultrasound is only accurate plus or minus 2 weeks so it is difficult to "backtrack" to a accurate LMP and date of conception.
Answered 8/11/2015
2.4k views
Related Questions
A member asked:
My LMP was 8/28/13 had a ultrasound on 10/22/13 said i was 7w5d.. Was that my baby age? Or my lmp..I have 35 days cycles so when did i conceive?
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Are two weeks added to ultrasound gest. Age like when calculating from the lmp? Eg, u/s on jan 13 estimated 9+1 age. So i conceived roughly nov 9?
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Please doctors when did i conceive I am due the 29th of august according to ultrasound and LMP was heavier than normal why is that? Was november 19th?
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How accurate are ultrasounds @ 6 weeks? My due date is august 29th according to ultrasound yesterday my LMP was nov 18 when did i conceive? Please? :)
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A member asked:
If my ultrasound matches lmp, when would I most likely have conceived?
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