I posted a reply that got delete because I also mentioned herbals ... oops. Is it just specific herbal products that cannot be mentioned? I can't find it in the Rules, but I remember reading it somewhere.
The information I read on Brava is that it is intended to be used many hours a day (e.g. all night while you sleep) for as much as a year. Most breast pumps just produce short-term swelling.
Breast massage is very important, no matter what else you do. I always massage pushing upward and inward to help achieve a better nipple position.
I started out just using a nipple pump, because one nipple was starting to become inverted. After frequent use for some time, I noticed some breast enlargement. Men are capable of lactation, so a good approach to grow real female breasts may be to work on nipple stimulation to the point of lactation.