Live hopper mouse left in overnight might help stimulate her to eat. Only try once a week though, or you will just stress her more.

Also, most babies will not start on rats, so finding a source of live mice will be needed. It's not illegal to feed live, just frowned upon if I'm not mistaken. Go get two adult mice, 1.1, and breed them. She weighs enough that she can go quite awhile without eating. I had babies hatch out last year at 45g and didn't assist feed until after 6-7 weeks post hatch. They lost maybe 5g in that time.