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A member asked:
How accurate is an us at 12w4 d? another at 19w1d, same edd.
A doctor has provided 1 answer
Fairly accurate: Evidence suggests that ultrasounds more accurately predict your due date than using your last menstrual period—but only in the first trimester and early second trimester (until roughly 20 weeks). Early ultrasound due dates have a margin of error of roughly 1.2 weeks. After 20 weeks, your Dr will measure your fundal height to see if the baby's growth is keeping on track with the EDD.
Answered 7/27/2020
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Related Questions
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Edd from 11 wk ultrasound is 11/12/13. What dates of sex could have led to this? Jan 18 fit into this range? What is the accuracy of 11 wk ultrasound?
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2 doctors weighed in across 2 answers
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