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HOW ACURATE ARE EARLY ULTRASOUNDS? must know date!

Hello.  I have an desperate question!  I had unprotected sex on 10/23 - 10/25.  I then had a period on 10/31 but do not recall how "normal" it was.  I then had unprotected sex again on 11/14 - 11/20 but my partner did not ejaculate inside of me fully.  Positive pregnancy test on 12/3.  Had HCG blood test on 12/4 with result of 70.  Had another HCG test on 12/8 with result of 450.  I then had an ultrasound on 12/15 and they said I was around 6 weeks!?!?  I dont understand as it seems 6 weeks would put me in the middle of the two!  There is a question of paternity here this is why I am so concerned!  How accurate are early ultrasounds?  With almost four weeks in between the dates of sex could this be narrowed down to a specific time frame?  THANK YOU!!
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568659 tn?1256139982
You had a period after having sex with the first guy, it doesn't matter if it was a little irregular it was a period.
Early ultrasounds are pretty accurate although can be a couple days off.
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Avatar universal
if your trying to figure out whos your babys fahter....you might very well need a dna test just to be sure.
Helpful - 0
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