Sperm storage of three or four months is common in some species and I've seen Neogonodactylus store viable sperm for six months. However, females will also lay unfertilized eggs so just because she produced a clutch does not mean that the eggs are fertile. If they have not been fertilized, she will probably eat them within a few days. If they are fertile and she takes care of them, they should hatch in about three weeks depending on water temperature.
Has this female molted since you received her. We think that most stomatopods cannot store sperm through a molt. THis is because the sperm storage organ is connected to the external cuticle and when the animal molts, the contents of the storage sac are lost. However, this has not been proven in O. scyllarus. My guess is, however, that if she has molted, the eggs will be infertile.
Roy
