Boy or girl nub at 13 weeks?

[Afernengel]

Hi I was 13 weeks here I'm now almost 19 and baby had been stubborn and not shown off their goods so I was wondering if you can tell by this ultrasound pic if it's a boy or girl?

[katewantsagirl]

I'd guess boy

[maidentomother]

Boy.

[girlygirrl]

boy guess here

[True Blue]

Boy :)