Although I can't speak from successful personal experience, I have heard the magic number is 8 weeks to break their diapause. I've never had success overwintering them in the fridge! I will try yet again though! I wonder if change in day length may be a factor too? Let me know if anyone knows someone who has successfully hatched a M. religiosa ooth after keeping it in the fridge.
i had it in a cardbord box and i am trying it again but this time in a jar.I refridgerated the egg i had last year from November to April and it hatched