The number of hairs transplanted will depend on how large your area of hair loss is. If you want to hide a relatively small surgical incision you may only require several hundred grafts. Each one containing between one and four individual hairs. This can be performed in a single session.
For larger areas of hair loss, as is seen with androgenetic alopecia, you may require up to 3000 individual grafts. Multiple sessions, split over different days, will be necessary.