When Can I See Final Result of Fat Grafting Done in Face?

In the early weeks, much of the volume change seen is swelling. There is often a period of relative under correction around 2-4 months while swelling is gone but grafts are not yet fully healthy. I would consider 4-6 months a reasonable time to evaluate final results. 

I use the time period of three months after fat grafting to judge the final result of volume retention. Theoretically, some talk about a longer period to allow for potential 'volumizing' (stem cell conversion into fat cells) but that has not been a clinical effect that I have seen.