They can(and do) easily get rolled when layed, and this is only realistic, and doesn't hurt anything at all initially. But far more importantly, once they have started to develop later on, it is more critical that they are not turned at ALL, as this can cause the yolk to calapse around the fixed embryo that is already become situated, and smother it, or even detach the embryo from the inner egg wall.

A very MAJOR reason for marking them is when you gently take them out to re-dampen the medium and remix it up good again. If they are marked and should roll accidentally, you can immediately situate them back to the way they were. But I don't even like the idea of them rolling at all even for a few seconds to be honest if I can at all avoid it, and I always set them in a crumpled up towel and place the eggs in the little "valley" wrinkles while I'm re-moistening the egg medium to keep them from accidentally turning.


~Doug
-----
"a snake in the grass is a GOOD thing"

my website -serpentinespecialties.webs.com

[ Show Entire Thread ]