I would say no development there I'm afraid but the yolk is pretty messed to tell for sure :/
The best way to check fertility is to collect some fresh laid eggs and crack them open without damaging the yolk so you can see the blastoderm (fertile) or blastodisc (Not fertile)
The best way to check fertility is to collect some fresh laid eggs and crack them open without damaging the yolk so you can see the blastoderm (fertile) or blastodisc (Not fertile)
