i've been on anavar (20mg/ed, uped to 30mg/ed for two weeks, then back to 20mg/ed) and still using my bc pill. no problems here.
what kind are you on? i am on mircette if it helps.
the one thing that has changed was my first period while on the anavar came about 4 or 5 days late and only stayed around for 3 days, not the usual 7. This last period was one day late and lasted when other 6 unitl i got to start up the white pills again.
hope this helps a little.
...dr