^ Good advice if you want to save the fry, but make sure you ONLY put her in it when she is about to drop, otherwise the stress will likely kill her. There is a pinned topic in the livebearer section on telling when a livebearer is ready to drop. Here's what to look for:
The anus will look like a white tube, not a white dot.
She will 'square off' or look square from the side, not curved. Also, the back of the belly should be dropped as much as the front.
She will refuse food, be antisocial, and hide or hover in a corner.