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Diapause is for a winter dormancy.
In terrarium bred eggs, there is no true winter, but there is still diapause.
Because of this, eggs will go into a rest state of varying length.
If you keep your eggs at a constant temperature, the length tends to last longer.
You can shorten it by keeping your eggs warmer for a couple of weeks (upper 70s), then cooler for a couple of months (mid 60s), and then back to warmer again for the remainder of incubation.
Or you can do daily night/day temp fluctuations of about 10 degrees and that will usually shorten diapause as well.
Or you can combine the two- keep them warmer for a couple of weeks, then cooler for a couple of months, then do day/night temp fluctuations- that is what I did a year or so ago and ended up with the shortest incubation of my life- near 5 months I think.
Or if you don't want to mess with your eggs and are a bit nervous because these are your first and you don't want to do anything too wierd- just keep them between the upper 60s and upper 70s throughout incubation and they will hatch.