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A member asked:

On 9/11/13 vaginal ultrasound i was told 6wks 3days .yesterday 10/1/13 i was told 10 vaginal ultrasound.what's my conception day window now? y 10wks

A doctor has provided 1 answer

Probably the same: The us at 6w3d is the best to use to date.The earlier the better. As the pregnancy progresses the dating has a +/- days early until the last trimester it can be up yo +/- 2weeks.

Answered 10/15/2013

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A member asked:

I had a transvaginal ultrasound on 11 june 2012. The doctor told me I am 6 weeks 3 d. Based off of this when is my most likely date of conception?

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