It takes a while before you notice the results of a hair transplant, and you can expect to wait several months or up to a year. As for when is the right time in an individual's life to have such a procedure, there is no right answer as it depends on the individual. Some men experience hair thinning around 35 years, while it may happen much earlier or much later for others. It is important to do your research into the various hair loss alternatives to determine which is the best course of action for you.