Skull theory or Nub theory Guesses?

12 weeks 2 day scan pictures. I know they are not the clearest but guesses would be appreciated :)
http://i57.tinypic.com/rhu1iv.jpg
http://i57.tinypic.com/qx5qtc.jpg

90% sure boy xx

Boy- nub looks angled up

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Thinking boy but not 100%.

boy

Hmm not really seeing the nub completely

Thanks everyone :) I guess I should be expecting our 3rd boy eek! Lol

boy