Why Didn't Hair Transplant Work?

This is highly atypical. What type of procedure did you have? A patient can expect new hair growth in 14 to 16 weeks, which usually maxes out at a year. New hair will continue to mature and thicken for up to a year-and-a-half after the FUE surgery. You should consult your doctor about the lack of growth.

They should have grown. In 35 years of hair transplants I have never seen them not grow in that amount of time. Get a second opinion.