The beauty about a hair transplant is that you can design the hairline however shape you desire. If you do not like your widow's peak, grafts can be placed in such a way as to camouflage it. Alternatively, if you want to create a widow's peak or soften your frontotemporal recessions, this can be done nicely with hair grafts. It is important, however, to understand that the majority of patients with male pattern hair loss will continue to thin as they age and that surgical intervention will do nothing to stop the hair loss process. It is nearly impossible to predict the final pattern in someone your age. Although it is possible to begin surgical restoration if you have conservative goals, a hair transplant will provide only a short term density boost since the preexisting hair will continue to thin over time. It is important for you to have a perspective of what your final pattern will be since your surgical options will be based on that final pattern and on the limitations of your donor area. Medical therapy such as Propecia/Finasteride and Rogaine/Minoxidil does have the potential to slow the hair thinning process.
At 19, you should never consider a hair transplant because your pattern of hair loss is not apparent and you will be chasing hair transplants for years. Run from any doctor who offers you a hair transplant