From the pic it seems fry will be on the way in a weekish. I could be wrong. Usually the female will hide near the heater or stay away from the rest of the fish if she is near her pregnancy. Her Gravid spot (dark spot near the end of the fish), will become very dark and large, it also may be dark and small depending on the size of the brood, also look for a small bulge or bump near the front of her tummy and check her size before feeding, if she is large and sqaurish no doubt fry are on the way. Make suer to have floating plants in the tank so the fry may hide, do not move her or this will cause her to abort pregnancy, the time to do that was wayyyy earlier,
The best of luck
Tom