I need your opinion ... 12week 3day...please...girl o boy?

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This is the photo of legs open...

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sorry no nub that I can see.....skull looks like the shape of my daughters tho but skull guessing's not as successful x

No nub.

because the skull seems to be feminine? I've never felt this thing.
They told me that the fetal heart is female ... because it is very high ... is 167 beats per minute .. is this thing real?
Please...give me some clarification..