And that time is now.
I had an emp that was pregnant. Be aware, as the Wiki info said, it can take 9-12 months to give birth. Mine gave birth a few months afer I got her.
Basically, she will look very fat. Then, towards the end, the last few weeks/months she will stop eating, and will become more aggressive. Then, one day, you'll go to her tank to find 1 or more little scorplings on her back, pure white.
It is vital you dont disturb at this stage, as she may well eat them. Keep the temperature nice and high (around 30C on the warm end), give her some deep substrate, like eco earth, keep it moist, and some nice hides, and keep it very very humid. You're really looking at approaching 100% humidity whilst the babies are on the back, else the babies are liable to not be able to moult, and die.
Offer food whilst the babies are on her back, but dont disturb her. Probably best to try pre-killed cricks. Remove any uneaten food every couple of days. The babies will stay on the mothers back until their first moult (ie, until they are 2I). My babies (she had 27!) took 11 days to moult, and then 2 more days to come off her back. That pic above is post-first moult, ie 2I.
Once they start coming off her back, seperate them into individual tubs, with small water bowl, and hide for each (like a bottle lid). Feed appropriately sized crickets every 5-7 days. Be careful not to let them get too fat, I have found that seemed to make them more likely to have problems moulting from 2I-3I. 5/27 of mine died.
And, good luck
Post some pics for us all to see!
Ash