Candling eggs throughout incubation

I like candling periodically. I do it at first of course, just to ease my mind and check for veins. I will do it periodically as well for my own curiousity..
Later into it, if you use just the right flashlight and the baby is at just the right angle, you can see part of the baby's pattern. But sometimes you can't. Tis is something that my husband and I "struggled" with last year; not seeing the babies in all of the eggs, and worrying if they were ok. Chances are, if you're this far along and the eggs appear healthy, there are good babies in there. I slit mine around day 60 but I do not recommend that for everyone; research it, ask people more experienced than I about slitting, and then you can make your choice about that. :)

Thanks very much for the input everyone. I appreciate it. I doubt that I'll slit the eggs. I'm not comfortable with that, but I guess if the incubation goes really long, I might be back on here asking questions about that too! Thanks, again.