M.religiosa ooth hatched after about 20 days of cold period, and about two months after being layed.
In details, 5 days after it was layed I put it near the window at about 15*C for 10 days, then placed to the fridge (+3*C) for 20 days, then again to 15*C for 10 days, and then back to room temperature (about 20*C). It hatched in about a month after being brought to the room.
Another ooth, that was laid on 1-st of March, hatched yesterday, March 30, without any cold period and after only one month of incubation, just like tropical species! The stock is from Russian Black Sea coast, where it requires winter diapause.
Both times there were around 50 nymphs.