Go to a derm/doc to see if there are any nutritional deficiencies (unlikely though). Once that's ruled out, get on Finasteride. 99% of people maintain their hair. Unless you're slick bald, this is a must if you're getting a hair transplant. After a year you can do a hair transplant, but really read reviews, maybe even meet patients in person. The hair transplants today are really good in the hands of a good doctor.