How Much of the Donor Strip is Actually Used?

When a strip from the doner site is harvested, what percentage of the hair from the strip can generally be used (the rest being wasted or damaged?)

Can the donar site be in the back corners of the scalp? In my case it seems more loose there and more tight directly in the back.

The donor area is that portion of the scalp that is seen in the Norwood Class 7 balding pattern (see image at right). This is the only permanent hair in men, assuming no other disease is present, such as alopecia areata.

There is a general rule hair transplant surgeons use which states that half of the donor area can be utilized for hair transplantation without impacting the integrity of the donor area. When a donor strip is taken, fully 100% of the hair should be harvested in that strip of scalp (short of a few damaged hairs, usually less than 4% of the total amount) and all of it should be used.