Donor anatomy
The direction beneath the skin can differ from the angle visible above it. Curved or changing follicle paths make extraction more demanding.
FUE quality control
What graft transection means – and what patients should ask
Transection is damage to a hair follicle during donor harvesting. It matters because a damaged follicle may be less useful for transplantation. The rate is not fixed: it can change with donor anatomy, extraction area, technique and surgical workload.
Medically reviewed by Prof. Irakli Bebiashvili, MD, PhD · Updated 2026-08-30
The practical meaning
Why the number needs context
A clinic can report transection in different ways: by follicles, by follicular units, or by separating complete and partial injury. Those figures are not automatically comparable.
A useful answer explains who extracts, how grafts are inspected and how the team responds when extraction becomes difficult. A percentage without a measurement method tells you much less.
Why rates vary
Three factors that change extraction difficulty
Extraction area
Published studies show that transection can vary across different parts of the donor scalp. One number does not describe every area equally.
Technique and workload
Punch choice, alignment, surgeon experience and fatigue can affect follicle damage during a long FUE procedure.
At Hairline International
Extraction remains a surgeon’s responsibility
A named surgeon from Hairline’s five-surgeon team performs graft extraction. The grafts are then examined under a microscope. Transected grafts are not implanted; intact grafts are sorted and counted on Petri dishes within the container-protective system. This keeps extraction, inspection and the documented graft count inside one clinical workflow.
See how grafts are handled →Ask any clinic
✓Who performs the extraction?
✓How are extracted grafts inspected?
✓Does the clinic distinguish complete from partial transection?
✓What happens if the donor anatomy makes extraction difficult?
✓Is the figure measured for this patient or presented as a universal claim?
Clinical sources
Research behind this explanation
Questions
What patients ask about transection
What does graft transection mean?
Transection means that part of a hair follicle is cut or damaged during donor harvesting. The clinical importance depends on where and how severely the follicle is injured, which is why complete and partial transection should not be treated as the same measure.
Is there one normal transection rate for FUE?
No single percentage applies to every patient, surgeon or extraction area. Published rates vary because donor anatomy, scalp region, punch technique, measurement method and surgical workload differ.
Does every transected follicle fail to grow?
Not necessarily. Research shows that growth depends partly on the level of injury, but severely sectioned follicles are less useful and may produce weaker growth. The practical goal is to minimise avoidable damage and inspect grafts during the procedure.
How does Hairline manage transection risk?
A senior operating surgeon performs the extraction. Every graft is then examined under a microscope, and grafts identified as transected are excluded from implantation. The intact grafts are sorted and counted on Petri dishes within the clinic’s container-protective workflow. Hairline does not publish one universal transection percentage for every patient.