I just have to question why on earth you would want to use steroids to put on weight? Especially being a female?!? Sounds extremely dangerous and risky to me. I had a female friend who was into amateur bodybuilding...and she took steroids for a short time and ended up with terrible acne all over her back and face. I would strongly advise against using steroids. Why not try and gain weight naturally by eating a healthy diet with more calories?