Other areas that suffer from hair loss have been difficult to treat because of the precision that is needed for natural looking transplants, especially on small areas such as the eyebrow. The technique requires precise techniques to replicate the same direction of hair growth as a natural eyebrow for a natural result. Eyebrow hair replacement uses donor hair from the scalp, therefore the transplants need to be maintained regularly as the hair growth will be the same as it was on the head. Generally this means a trim every 4 to 6 weeks, the same frequency as visiting a beautician for plucking.