This is just a floating yolk, right?!

[LinzeeBrie]

No veins, just not fertilized? Late on day 6 (because I'm impatient )

I had relatively better luck with the other 11 - was able to at least catch GLIMPSES of veins and a couple of eyes Here's my fav picture, just for fun:

 

[MGG]

The first one looks infertile, but leave it in until day 10 to be safe. That's amazing! Congrats! It's so exciting to see those little babies in there.