I want to breed!!!

i have two female gerbils who are sisters and they get on very well together. i want to breed them, would it be alright to get a male gerbil? how would i introduce the male gerbil to the females??

You can not introduce a male gerbil to a pair of females. You must choose your breeding female and separate her from her sister.
   
To introduce the female and the male:
   
You need to create a split cage using at least a 10 gallon aquarium. Switch the gerbils every other day. After about a week place the gerbils in a new cage that neither has been in yet. Be ready to separate a fight. Watch the closely for a few hours to make sure no fights brake out. If they do fight remove the two and put them back in the split cage. Don't be disappointed if your pair never has a successful introduction, just try again with a different pair.
   
For more info on this check out the American Gerbil Society website or the gerbil forum.
   
Tips on breeding:
   
Get to know gerbil genetics so you can guess the outcome of the pups colors. Some colors are more valuable then others. Also, tame them from a young age so they are people friendly.