can anyone see a nub. Please help and have a guess

[Katie2012]

This is my second pic from my 13 week nt scan. thanks

[Violet_]

Pretty hard to tell because of the position baby is lying in.

[Katie2012]

Thanks for replying, is that the nub I can see? I don't really know much about it all.

[lovemy4]

The nub wasn't captured in this shot.