Is there a nub?

[grapevines]

I had my first ultrasound today at 15 weeks.
I'm trying to look for a nub to tell the gender, but i'm having no luck :(

31517
http://i.imgur.com/XjcB9BY.png

[Mamato3?]

I would guess boy.

[familymatters]

Boy guess too

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[grapevines]

where are you guys seeing the nub? If i'm looking at what youre looking at, it looks to be pointing down....doesnt that mean girl? : o

[Mamato3?]

The white spot over the flat line is what makes me guess boy.