I think some people get the cause and effect turned around when apparently losing eggs to bacteria or mold. Probably 99% of the time, the egg or embryo dies first and then the bacteria and mold set in giving the impression that the egg was killed by these micro-organisms. The immune system of these eggs is fairly well developed, and most are laid in proximity to ground humus in the natural environment that is loaded with a multitude of mold and bacterial species. Good photo evidence, thanks for posting.

Kelly