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A 25-year-old female asked:

Whats more accurate as i dont no my last period as never tracked them. ultrasound at 7 weeks and 12 weeks gave me edd 17th feb 2022 when did i conceive and how accurate is this?

1 doctor answer2 doctors weighed in
Dr. Timothy Brown
Obstetrics and Gynecology 41 years experience
Early ultrasound is the best we have to accurately calculate your EDD, and if your 7 week and 12 week ultrasounds are giving you the same date then you can be confident in it. Most babies will come within a week plus or minus your due date. Based on your EDD you conceived May 27, plus or minus 2 or 3 days, but it could have occurred from sex several days before.
Last updated Oct 13, 2021

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