it wont lay the eggs. She will carry them until they are ready to hatch and then shell crawl up onto the top of some rock and thousands of shrimp larvae will hatch into the water. if you want to try and catch them put a flashlight at one side of the tank away from your filter and all the larvae will accumilate near the light and you can scoop them out.
As for raising them i havent had any luck yet ( i have 2 skunk cleaner shrimp) but im working on it.