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A member asked:
My 8 week ultrasound said i conceived may 15th but paternity test says i conceived in april. how could ultrasound be so far off?
A doctor has provided 1 answer
+ or - 2 weeks: Ultrasound exams have an accuracy of plus or minus 2 weeks on either side of a date given in a report. Accuracy improves with multiple examinations over time(serial) that can determine fetal growth patterns. Technology is wonderful, but not the be all and end all in medicine. There is still room for MD's who can discern by examination, history, and LMP issues such as this.
Answered 7/30/2018
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Related Questions
A member asked:
HI I am 26 wks and all mu ultrasounds have the same EDD of 9/13 could it be off a few days or is it accurate to say I conceived on 12/22?
2 doctors weighed in across 2 answers
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If my 8 1/2 wk ultrasound says I conceived 10/27 what dates would I have had to have sex on?
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Since ultrasounds are pretty accurate these days plus or minus 3 days and mine says i conceived december 6th I am going to say i conceived dec 3-9?
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If ultrasound says i conceived around 10/27, what dates would sex had to have happened for a conception date close to that?
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Ultrasound on 4/12/13, i was 9w4d doc say i conceived on 2/1/13. But 2/1/13 was the 4th day of lmp(21days cycle) could ultrasound be off a few days?
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