If you mean that it can some times take between 12-18 months approximately to observe physical progress. Yes you are correct in your assessment. To confuse matters a bit, it needs to be mentioned to all prospective/new finasteride. users in particular, that in the event your progress is undetectable( to the naked eye) does not mean you are not benefitting maintenance-wise, so to speak from it. We all want regrowth from treatment. This is never a question, and it's easy to overlook /undermine the less obvious or visible accomplishment that finasteride. users can potentially experience, and that is retaining the hair they still have. Securing one's ground(hair) is a huge win and perhaps a more substantial victory long term than regrowth.