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A member asked:
Why do doctors choose to go by ultrasound for edd instead of lmp, even if lmp is known?
4 doctors weighed in across 2 answers
More accurate: LMP is a traditional but rather inaccurate way to estimate a baby's due date. Ultrasound is more accurate, because babies grow at different rates, so the date is adjusted based on your baby's individual measurements. That being said, we aren't all that great at predicting the future. Only 5% of babies are actually born on their due date. Hope this helps!
Answered 9/1/2014
3.7k views
Most accurate: Sometimes women can be unsure of their LMP. The ultrasound measurements are believed to be more accurate in assessing gestational age. However, they often do coincide within 2-3 days.
Answered 5/19/2017
3.7k views
Related Questions
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I know when my lmp was but when they didn an ultrasound they gave me an edd of January 13 when it should be around December 31st?
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A member asked:
I have had 2 Ultrasound scans that show my EDD as 9th January and 7th January respectively. it doesn't tally at all with my LMP. A lot of weeks off. About 6-8 weeks?
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People also searched for:
What makes doctors decide to go by ultrasound for EDD instead if LMP? EDD was changed from January 2 (LMP) to January 12 (u/s)
What if you know your LMP (which is regular 28 day cycle) but doctors change EDD going by first ultrasound. Why, did I ovulate later or what??
The doctors determined my due date from an estimated lmp, it was nov4 . Sept 16, i got an ultrasound that read oct25 which date is accurate?
My LMP was unknown so on 7/20 doctors said i was 8w3d by ultrasound & told me my due date is 2/26/13 & that i conceived on 5/22 is this correct?
When does it mean when a doctor considers the LMP due date and conception if the ultrasound is in a 7-10 day agreement with the lmp? Need an example
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