Most people know that a hair transplant is a permanent procedure. Taking hair from the donor area and transferring it to another area is an irreversible process. However, it’s important to understand that transplanted hair follicles also have a natural lifespan and may stop growing after a while. If you want to understand what makes hair transplants successful, then keep reading. This article will help show you how hair transplants work, and how to ensure you keep your results for a long time to come. Donor hair comes from parts of the scalp that are genetically resistant to hair fall. Experts observed that the back and sides of the scalp are consistently spared from balding. This is because this horseshoe-shaped area is not affected by androgens. Androgens are male hormones that, when produced in large quantities, can cause hair loss.