Early: You do not say how certain you are of the 4w3d dating, but assuming that is correct it is early to see either a yolk sac (~ 5 weeks) or a clear fetal pole. Sorry you are worried, but US before the fifth week is usually inconclusive because things haven't had a chance to become visible yet. Good wishes.
Answered 7/8/2015
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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