What Happens During an FUE Hair Transplant?

At New Hair Graft, we have designed every stage of this day to be as comfortable as possible. Here is how it really unfolds, with no shortcuts, along with the technical benchmarks that allow you to judge any clinic seriously, wherever it may be.

Before the procedure: the diagnosis shapes everything

Everything begins with a precise hair diagnosis. The surgeon assesses your hair type, how your hair loss is progressing, and the density and quality of your donor area, then defines a tailored strategy.

Who is a candidate, and who is not yet

The clinical guidelines are precise, and they are well worth knowing before booking an appointment anywhere.

• A good candidate has stable hair loss, with at least 50% thinning or balding in one or more areas.
• The density of the donor area matters as much as the surface to be covered. It normally ranges from 65 to 85 follicular units per square centimetre. Above 80 is excellent. Below 40 is unfavourable.
• Unstable hair loss, or miniaturisation above 15%, calls for six to twelve months of medical treatment before surgery is considered.
• For a young patient, the recommendation is to wait, ideally until after the age of 25, and to begin with a year of medical treatment.

A clinic that agrees to operate without discussing any of these points is not doing you a favour. Declining or postponing a procedure is part of the job.

Pre-operative tests

They are more thorough than most people imagine, and that is a mark of a serious clinic. Clinical guidelines recommend a full blood count, a coagulation screen, iron studies including ferritin, TSH, fasting blood glucose and serology tests. A magnified examination of the scalp, known as trichoscopy, also helps rule out early scarring alopecia, which would make a transplant inadvisable.

Designing the hairline, the most underestimated step

This is where the natural look of the result is decided, before a single graft is placed.

The design is never left to the inspiration of the moment. It follows anatomical landmarks: the mid-frontal point sits around 8 centimetres above the glabella, the frontotemporal angle should remain acute and never obtuse, and the temporal peak lies on the line joining the frontotemporal angle to the outer corner of the eye.

A well-designed hairline has an irregular transition zone, made of single-hair grafts placed without alignment, followed by a denser zone behind it. This deliberate irregularity is what makes the edge invisible. A hairline that is too low, too straight or too dense is the first sign of a poorly planned transplant, and it will not age well.

The approach must also be conservative. Grafting only the top of the scalp, for example, risks leaving an isolated patch of hair once the surrounding native hair eventually disappears.

On the day: welcome and anaesthesia

You are welcomed into a calm, discreet setting. Together we confirm the plan and draw the hairline, then comes the local anaesthesia.

It combines targeted nerve blocks with what is known as tumescent infiltration, a mixture of local anaesthetic, adrenaline and saline solution. This tumescence serves a precise technical purpose: it firms the skin, straightens the follicles and evens out their depth, making a clean extraction easier.

This is the step many people dread, often without reason. A few micro-injections are enough, and it is the only genuinely unpleasant moment of the day. Once the anaesthetic has taken effect, you no longer feel anything.

Extracting the grafts

This is the heart of the FUE technique. Follicles are extracted one by one from the donor area using a cylindrical micro-instrument, with no scalpel and no stitches. The diameter of this punch is generally between 0.8 and 1 millimetre, and the insertion depth is deliberately limited to a few millimetres.

The transection rate, the figure to ask about

It is the best objective indicator of extraction quality, and hardly anyone thinks to ask for it.

Transection is the proportion of follicles damaged during extraction. The specialty's international learned society gives a clear benchmark: 3% or less is good to excellent, above 5% the result is poor.

This rate depends enormously on the operator and the instrument. A half-scalp study, in which the same surgeon used two types of punch on 20 patients, measured 23.6% transection with a sharp punch versus 9.7% with a blunt punch. The result is counter-intuitive, and it is a reminder that the equipment and the surgeon's hand matter far more than the commercial name of the technique.

There is even an indexed publication devoted to the influence of the surgeon's workload on the transection rate. One more reason to be wary of centres that treat ten to twenty patients a day, one after another.

The donor area is a finite resource

You will often read that up to 50% of the donor area can be harvested. This figure should be set aside: it stems from early work on the removal of individual hairs, not on the extraction of follicular units.

Leading practitioners reason differently, and more accurately. They recommend extracting in the region of 10 to 15 grafts per square centimetre in a single pass and, above all, they set a floor: maintaining a residual density of 40 to 50 follicular units per square centimetre. An objective measurement carried out on 10 patients put the actual extraction at around 35% of hair density, and its authors recommend not exceeding this threshold in a first procedure.

These figures do not all agree with one another, and we would rather say so than invent one. The consensus concerns the criterion, not the percentage: what matters is what remains, not what is taken.

Sorting and preserving the grafts

Each follicle is sorted under close visual control according to the number of hairs it contains. The finest units go to the front line for a natural look, the denser ones further back for volume.

Meanwhile, the grafts are waiting, and this is a critical moment. Historical data show a loss of roughly 1% per hour outside the body: around 95% survival at two hours, 86% at six hours and 79% at twenty-four hours.

A useful clarification: the well-known “six hours maximum” threshold does not exist as a hard cut-off. Survival declines continuously and, within the real duration of a procedure, the storage solution matters more than the time elapsed. Comparative studies show considerable differences between solutions over the same period. The authors of the leading review nevertheless conclude, honestly, that no ideal solution or temperature has yet been demonstrated.

Creating the recipient sites, and the question of density

The surgeon then makes micro-incisions that respect the natural angle, direction and depth of your hair. The angle is 45 degrees or less, and even flatter in the temple areas. The depth is set at about one millimetre less than the length of the graft: too deep and there is a risk of folliculitis, too shallow and the graft pops out.

As for density, the published benchmarks are as follows:

• frontal transition zone: around 20 to 30 grafts per square centimetre
• central zone: around 40 to 45 grafts per square centimetre
• cautious overall target: around 30 follicular units per square centimetre

And there is an upper limit worth knowing: above 60 grafts per square centimetre, the blood supply to the dermis can be compromised, creating an ischaemic environment that reduces graft survival. Denser is therefore not better. This is worth bearing in mind when faced with promises of maximum density.

For perspective, natural hair has 65 to 85 follicular units per square centimetre. An implantation density of 35 or 40 is therefore well below that, and this is perfectly normal. The principle at work is the illusion of density: half the real density is enough to give the impression of a full head of hair.

Implantation

The grafts are then implanted one by one. The whole art lies in reproducing growth exactly as it would occur naturally. Once the hair has grown back, no one can tell there has been a procedure.

Two approaches coexist: pre-made sites followed by implantation with forceps, or an implanter that creates the site and places the graft in a single movement. A study of more than 15,000 grafts showed that the implanter damaged only 0.5% of follicles and caused no crushing, but it included no direct comparison with forceps. No superiority can therefore be concluded.

The documented advantage of the implanter is logistical rather than biological: it allows implantation to begin while sorting continues, which reduces the time the grafts spend outside the body. That in itself is a good reason.

A comfortable day, not an ordeal

This is the most reassuring and least known aspect. You remain lying down or semi-reclined, relaxed, with breaks and lunch. You can watch television, listen to music or chat with the team. Most patients are surprised by how quickly the day goes by.

On duration, let us be transparent: no scientific source publishes a scale of duration by number of grafts. The four-to-eight-hour ranges quoted everywhere come from clinics, not from the literature. What the literature does indicate is that a large session takes a full day, and that very high volumes are sometimes spread over two days.

The end of the procedure and your aftercare instructions

The surgeon checks all the work and gently cleans the treated areas. You leave with clear, written instructions.

The main ones, as set out in the clinical guidelines:

• sleep with your head raised at 15 to 30 degrees for the first week
• ice on the forehead, never on the grafts, for 20 minutes every two to three hours
• a first gentle wash from 24 hours onwards, without rubbing and without a direct jet of water
• no strenuous exercise or heavy lifting during the first week
• no full immersion of the head for two to four weeks
• avoid direct sun for one month
• wait one month before a haircut or colouring

We cover these rules and the most common mistakes in detail in our article on mistakes to avoid after a hair transplant.

The next-day check-up and follow-up

The day after, we see the patient at the clinic for a check-up and carry out the first wash together, showing them exactly how to wash their head over the following ten days. Whenever possible, we also prefer to see them again ten days after the procedure.

Follow-up consultations are scheduled at 3, 6, 9 and 12 months, and you can contact your doctor whenever needed throughout the regrowth period. This schedule is not a sales argument: it reflects the real biological timeline, as the result can only be properly documented between the sixth and the twelfth month.

FUE, FUT, DHI: what is proven and what is marketing

This section goes against what you will read elsewhere, including on the websites of clinics that, like us, perform FUE.

FUE does not eliminate scarring, it fragments it. The international learned society itself sets out the calculation: for 1,000 grafts harvested with a one-millimetre punch, the cumulative incision length reaches about 314 centimetres, compared with about 12.5 centimetres for a strip of equivalent yield. The difference is that these micro-scars are tiny dots, widely scattered, and therefore invisible with short hair. That is a real advantage, but it is not the absence of a scar.

No serious study has established that FUE offers better graft survival than FUT. The learned society states this explicitly. The only direct comparative data involve two and three patients, and their authors themselves say no conclusion can be drawn from them. Clinical guidelines even credit FUT with a lower transection rate and better preservation of residual density.

We perform FUE because its advantages are real and important for our patients: no linear scar, no stitches, a faster recovery and less post-operative pain. But presenting FUT as outdated would be inaccurate.

DHI is not a transplant technique. The position of the ISHRS is unambiguous: it is another name for implantation using implanters, and it should not be marketed as a distinct method. The extraction is still FUE. The same applies to names derived from a blade material: they describe an instrument, not a procedure. The society adds that there is currently no single best FUE method.

When a clinic invents a name for the most common procedure in the field, it is worth looking at what lies behind it.

After the transplant: recovery and regrowth

Small scabs form and then disappear within one to two weeks. Most patients return to normal life within a few days. The implanted hairs shed between the second and eighth week, which is normal and expected; regrowth then begins from the third month and fully reveals itself between the ninth and the twelfth.

Ongoing medical treatment, meanwhile, continues: it does not protect the grafts, which do not need it, but the native hair around them.

Ready to take the next step with confidence?

A hair transplant is above all a personal decision. You deserve to be supported by a team that takes the time to understand your situation and to build a realistic, lasting plan with you.

If you were to remember only three questions to ask the clinic you are considering, whichever it may be: who performs the extraction and the implantation, what transection rate they aim for, and what density will be left in the donor area. The answers will tell you more than any before-and-after photo.

The first step with us is simple and without obligation: a free, personalised hair diagnosis. You can also browse our FAQ in 20 questions.