How to get guppies to give birth faster?

Question

like temperatures, other fish, things like that???

Answer 1

make it two degrees hotter, add aquiarium salt

Answer 2

Warmer temperatures will speed up a guppy's metabolism so that everything in it's body goes a little faster, including gestation.  You can shorten the female's pregancy by about 2 days by increasing the heat a few degrees.  Bear in mind that you are also shortening the fish's lifespan by doing so.  84 degrees F is about the maximum.  

Also, if you think your fish is very close to term you can try a small water change with slightly cooler water and a generous feeding of fresh or frozen bloodworms just before lights out.  Try to mimic a rainstorm with the water change, trickling the water all through the tank.  Sometimes this will trigger a pregnant guppy to drop her fry.  They will often be triggered to drop during thunderstorms due to the pressure change.

Answer 3

Do not try to alter nature. Let nature take it's coarse because you might do something that might stress the guppy and kill the mother AND the fry, so just leave the mother to have it's fry,and eventually you'll have too many and regret posting this up. Lol.