Hair growth can be stimulated by the use of an FDA approved medications such as DHT blocker in combination with a hair transplant. After receiving hair restoration surgery, you hair growth will progress slowly, but after a year you’ll have full results, at least three inches of new growth. Hair growth after surgery could surprise you because many patients undergo shock, which means that all of the newly transplanted hair will fall out. There’s nothing to worry about because your hair will start to grow in after three months.