Anavar actually has a pretty significant virilization rate at 10 mg/day and above. Much moreso at 20 than at 10 of course, but it still happens sometimes at 10. I can't provide numbers for the rates, but it's certainly not rare.
As odd as it may seem, I tend to think that common opinion of how suitable for women oral anabolic steroids are derives from the standard dosage size, not that that is a good basis, and also is, if one were going to apply that at all, taken in a backwards way.
In other words, oxandrolone is thought mild... why? Well Anavar comes as only 2 mg tabs!
The actuality is that drugs such as oxandrolone and Anadrol were intended by the manufacturers for use by women as well as men, and the standard dose was chosen such that one tablet per day would be suitable.
The reason Anavar came in only 2 mg tabs was because that was what was considered safe and effective including for women.
That the amount is only 2 mg should not be taken as evidence that the substance is mild.
The reason Anadrol came in 50 mg tabs is because that was what was considered safe and effective, including for women, for that drug. Not that I am recommending going that high, but doctors, the FDA, and Syntex thought so.
But yes, 2 mg of oxandrolone is mild, for just about everyone (except perhaps for those right on the edge that likely would suffer natural hirsutism and/or husky voice sooner or later anyway.)
5 mg also counts as mild, IMO, though with slightly higher rate of problems while still low.