It takes 5 - 7 weeks days to hatch. I had one that took 49 days to hatch, but most of the Orchid ooth will hatch in 35-42 days. When the orchid female is well fed, she will lay the ooth at least once every 3-4 week. Some of my mated female orchids have produced 4 ootheca each and it is looking great. I believed she can continue to lay another 1 or 2 oothecae.