What is the longest time for an hisser roach being pregnant?

[IceRoach]

What is the longest time for an hisser cockroach being pregnant? One of my cockroaches have been pregnant for atleast 5 months 

 

[BlattaAnglicana]

There's a thread on this forum from a few years ago about a hisser female that was pregnant for about 9 months before giving birth to a huge litter of 40 babies! So yours may well have a while to go yet 

Here it is:

 

[pannaking22]

They can prolong their gestation if they don't like conditions, so it's pretty easy for them to go months without giving birth and then suddenly pop when conditions are right. Sometimes you just get weird females too though and they take their sweet time doing it.