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A member asked:
My edd based on a dating ultrasound at 9 weeks was 11/18. what possible days of intercourse could have led to this conception?
A doctor has provided 1 answer
2-26-12: For menstrual dating assuming a 28 day cycle, ovulation would have occurred approximately feb 26. Conception would have surrounded this date within 1-3 days. Throw in the margin of error of an early ultrasound & you can possibly expand conception range by a few more days. Talk to your doc if this doesn't make sense. Take care.
Answered 12/9/2013
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