Watch for signs of stress while she's in there, it could do more bad than good.
I have a breeding cage too but I only use it to protect the babies. I don't have my females give birth in them because I can't determine when they will pop and they seem to freak out too much. I just add tons of hiding places in the tank and let them give birth. Then when I poke around and notice babies, I take them out with a turkey baster and put them in the trap.