They are pretty much like a Jackson's, if you are familiar. The questions is how fast do you want to burn the female out?
The male will breed, no matter the "season". The female needs to recoup after having a litter, that could be a few weeks if you are trying to produce many babies quickly, the more caring/humane way is to give her a few months and fatten back up before you let them go at it. You should keep them separated after a successful copulation.