It's known that using small follicular unit grafts of 1 to 4 hairs and large sessions of 2000-4000 grafts is the ideal procedure for a patient who wants to achieve the most natural result with the least number of sessions. As beneficial as it is for the patient, it is equally unappealing for the physician performing the hair transplantation procedure.

Such megasession procedure requires the physician to be more detailed and exact, both in the cutting and placing of the graft. Moreover, using smaller grafts results in the need for more of them. Thus it is more labour intensive. It necessitates a larger staff and longer time commitment to achieve the desired result. While it is more labour intensive and therefore more costly to the clinic, the belief is that the doctors should bear this added financial burden. This is because they're not moving that much more hair, they're just moving it in a better manner.

Some hair transplantation physicians say there is not sufficient circulation in the recipients site to place 2000-4000 grafts and ensure successful growth. That is not true. It may be the case with sessions of 1000 to 2000 grafts IF grafts larger than four hairs follicular units are used. Such grafts are called variously as minigrafts or bi follicular unit grafts. And it's usually physicians using grafts of this size that make this statement.

However, hair transplantation mega sessions of 2000-5000 grafts with grafts of 1-4 hairs are completely successful. Performing sessions any smaller would be counter productive to the patient as it would not maximize the procedures potential.