The fact that people still ask the same questions as in 2001 implies that no, there is little or no info on women using AAS & being on birth control. As I mentioned in a different post, most women who COMPETE and choose to use AAS will usually also choose to go off hormonal birth control simply because the estrogen-pattern effects of the birth control go against what they are trying to accomplish w/ diet & training for the competition, and the further leaning, etc from the AAS. The two just conflict in their fundamental effects.
If you are training heavily and dieting alot, that in itself can cause amenorrhea, which further fights the regular effects of your birth control.
There is a lot going on when you are artificially manipulating your sex hormones. I'm not sure that you will find anyone who will say categorically that your b/c will remain effective. As I said before I'm not a doc - but it appears from the lack of this categorical statement that you can assume you won't get pregnant (if that is ultimately your question) and I would suggest you assume you can get pregnant while on and until your period comes back normally and use a back up method of birth control.
Its the on-going question I will grant you - but as when playing w/ any non-doctor prescribed and controlled substance - you are your very own personal Petri dish. So be careful and conservative in anything you do.