4 months since they hatched or 4 months since theyve been laid? If they were laid 4 months ago and haven't gone bad i would say they are most certainly fertile.
What is 4 ths? Days, Weeks? Anyway, if they are very yellow they probably aren't good, but don't throw them away. If they start to mold and shrivel and your vermiculite isn't too wet, I would say they aren't fertile. If they are white and plump they probably are fertile.
It was 4 mths since theyve been laid. My male mated with my friends female. the eggs look fine they some have a brownish tint to them, none look yellow or shrivelled. thanks for the help.