Usually, a maximum of 6000 Follicular Units (FU’s) can be implanted in a single session, depending on the patient’s needs. But not all patients need that amount of follicular units. Other patients do not have that amount in the donor area without their extraction leaving the area visibly depopulated. If a second procedure is necessary (provided there is sufficient donor area), it should be performed within a period of no less than 6 months.