I know I have had people say not to pull them until day 15. Myself I have had them blank until day 12. After that they just look iffy. I pulled a few eggs once and thought they were junk, then broke them into the garbage can. Was sick when I saw the baby chick/blood/fetal mass whatever you want to call it. Now I hardly ever throw, unless I am positive it is a clear.
Aww, that's unfortunate
