Some side effects (like oily skin, mood swings, GI issues, liver stress, etc) are just temporary, and they will subside as soon as you stop taking them. However, the virilization side effects are usually permanent, and they stay even after a lady stops using steroids. That is why women should be very cautious when planning a steroid cycle.
As for muscle mass, both men and females will lose muscle mass rather fast, and this process will usually start 2-3 weeks after stopping the training.