Like Chris said, mantids get wings when they molt into adult. After about 2 weeks from their last molt, they are ready to mate. In the wild, mantids hatch in the spring and die in the winter. In captivity, however, females can live much longer.
Porky will probably begin laying oothecae soon. M. Religiosa(European mantis) oothecae(mantis egg sack) need a cooling period before they hatch, and it normally takes about a month for them to hatch after the cooling period. So you could keep the ooths in the fridge until spring, hatch them, and release/sell any that you dont want if you prefer to do it that way. Female mantids will lay an ootheca every couple of weeks until they die.
Im sure you could find plenty of hatching techniques by looking at some old posts. You can keep the oothecae the same way you would a chinese mantis ootheca(tenodera sinensis).
Thanks,
Andrew