Women can run low doses for much longer periods than guys can because turning off of natural test production is not a big issue - thus no PCT - post cycle therapy - is needed. Just run the dose like QT said and please pay attention to diet & training. If she isn't already on a tight diet & trainign /cardio program that is producing fat reduction results, she willl probably just get bulky on Anavar - oxandrolone - or Winstrol - stanozolol. And also remember to not get hung up on looking at the scale because these are male hormones and will help promote muscle development so she's not going to just see the lbs come off- if all is in place, should see the bodyfat drop but not necessarily "weight". There is also the chance that she may retain water from either of those compounds as well.
Please make sure she is aware of the possible sides & expect that her period (the flow,. doesn't mean you can't get pregnant) will be interrupted probably beginning the next cycle after she starts taking whatever anabolic androgenic steroids and most likely won't come back until the next cycle after 3 weeks after she stops the AAS. I'd also include acidophilus in her supplements because presence of any AAS can also cause a yeast infection or vaginosis.