Progression of female hair thinning at the crown, with a woman's portrait

Hair restoration basics

The Ludwig Scale of Female Hair Loss, Explained

What each grade of the Ludwig Scale describes, why the frontal hairline stays intact in the female pattern and how a grade fits into a medical evaluation. The grade describes the loss; it does not diagnose the cause.

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Hair restoration basics

What the Ludwig Scale is

The Ludwig Scale describes female pattern hair loss. It was published by Ludwig in 1977 and it defines three grades, I, II and III, by how much density is lost over the top of the scalp. Its defining feature is that the frontal hairline is preserved while the part line widens and the crown thins, which is what separates the female pattern from the receding hairline described by the Norwood Scale.

Why a scale is useful, and where it stops

A grade gives a clinician and a patient the same words for what they are looking at, and it makes change over time comparable. It does not diagnose the cause and it does not decide the treatment. Female hair loss can also come from thyroid disease, iron deficiency, postpartum shedding, medication or traction, and several of those are reversible. That is why a grade is a starting point for a medical evaluation, never a substitute for one.

Diagram of follicular miniaturisation, the process behind the loss of density in female pattern hair loss

Read the scale

The stages, one by one

Ludwig defines the three grades I, II and III. The density steps inside grades I and II, and the frontal pattern, come from the Savin refinement of the same scale, which is the system these reference images follow.

Grade I-1, top of the scalp with the part line barely wider than normal

Grade I-1

What it shows

The part line is barely wider than usual and the change is easier to feel than to see. Hair volume when tied back may be the first thing a patient notices.

What is usually discussed

Confirm the cause before treating anything
Blood work when shedding is recent or diffuse
Medical therapy is the usual first route
Photographs at fixed angles to track change

Grade I-2, top of the scalp with a visibly wider part line

Grade I-2

What it shows

The part line is visibly wider and scalp starts to show through under direct light, while the frontal hairline stays where it was.

What is usually discussed

Medical evaluation and diagnosis first
Minoxidil is the therapy most often discussed
PRP may be considered alongside therapy
Surgery is not the usual answer at this stage

Grade I-3, top of the scalp with the part line widened and thinning spreading sideways

Grade I-3

What it shows

The widening reaches further back and thinning spreads to either side of the part. Styling starts to be used to cover it.

What is usually discussed

Diagnosis, since diffuse loss has several causes
Therapy to hold what is there
PRP as a support option, not a replacement
Re-assess with photographs before any surgical talk

Grade I-4, top of the scalp with a wide oval of thinning around the part

Grade I-4

What it shows

A wide oval of thinning surrounds the part line. The frontal hairline is still intact, which is what keeps this in grade I.

What is usually discussed

Medical route remains the first line
PRP or biocellular therapy may be discussed
Selected cases may be evaluated for surgery
Donor area is assessed before any plan

Grade II-1, top of the scalp with pronounced diffuse thinning over the crown

Grade II-1

What it shows

Density over the crown is clearly reduced and the scalp is visible without parting the hair. This is where many patients first seek help.

What is usually discussed

Diagnosis and blood work if not done yet
Therapy to stabilise before anything else
Surgery only after evaluation, in selected cases
Donor density decides what is realistic

Grade II-2, top of the scalp with extensive thinning and scalp clearly visible

Grade II-2

What it shows

Thinning is extensive over the top of the scalp and the contrast against the preserved hairline is obvious.

What is usually discussed

A physician-reviewed plan, not a single treatment
Therapy is usually part of the plan either way
Surgery may be an option in selected cases
Expectations are set against donor supply

Grade III, top of the scalp with diffuse loss over the whole top area

Grade III

What it shows

Diffuse loss covers the top of the scalp. Ludwig III is the highest grade the original scale defines.

What is usually discussed

Full medical evaluation before any procedure
Therapy to protect what remains
Surgery in selected cases and often staged
Density goals are discussed openly and early

Beyond grade III, top of the scalp with loss beyond what grade III describes

Beyond grade III

What it shows

Loss beyond what grade III describes. The original scale does not number this further, so it is described rather than graded.

What is usually discussed

Diagnosis takes priority, other causes are ruled out
Donor supply is the limiting factor
A plan may combine therapy and staged surgery
Some cases are not surgical candidates, and that is said plainly

A pattern worth knowing

The frontal pattern

Savin describes a variant in which thinning widens towards the front of the part, so the part looks like a Christmas tree from above. The hairline itself is still preserved, which keeps it inside the female pattern, but the shape changes where density is lost first. It matters for planning: where the loss sits changes what a treatment can and cannot restore, and it is one more reason the same grade can lead to different plans in two patients.

Front view of a patient whose thinning widens towards the front of the part — The frontal variant seen from the front, with the hairline preserved

What comes next

Can women have a hair transplant?

Yes, in selected cases and after a medical evaluation. The condition for surgery is not the grade on its own: it is a clear diagnosis, a donor area with enough density to move, and loss that has been stable rather than actively shedding. Early grades usually go to therapy first, because a transplant does not stop a process that is still running. This is the same criterion published on our hair transplant for women page, and nothing on this page changes it.

A grade helps describe the situation. It does not qualify or disqualify anyone for a procedure, and no treatment plan is issued without physician review.

Hair transplant for women, when it works Free Evaluation

What an evaluation looks at

The cause of the loss, not only its pattern
Whether shedding is active or the picture is stable
Donor density and hair calibre
Health history, medication and blood work
What density is realistically achievable

FAQ

Questions about the Ludwig Scale

Is the Ludwig Scale the female equivalent of the Norwood Scale?

In practice yes, but they describe different patterns rather than the same pattern in two sexes. Norwood tracks a receding hairline and crown loss. Ludwig describes loss of density over the top of the scalp with the frontal hairline preserved, which is why it needs its own scale.

How many stages does the Ludwig Scale have?

Three: grades I, II and III, as published by Ludwig in 1977. The finer density steps you see in reference charts, such as I-1 to I-4, come from the Savin refinement of the same scale, not from Ludwig itself.

Which stage needs treatment?

Any stage can be treated, and the stage is not what decides it. What decides it is the cause and whether the loss is active. Early grades usually start with medical therapy, and later grades may add a surgical option, always after a physician evaluation.

Can women have a hair transplant?

Yes, in selected cases and after evaluation. It requires a clear diagnosis, a donor area with enough density and loss that has stabilised. Women whose loss is still active are usually treated medically first.

Does the scale tell me the cause of my hair loss?

No. It describes what the loss looks like, not why it is happening. Thyroid disease, iron deficiency, postpartum shedding, medication and traction can all produce thinning, and several of those are reversible once identified.

What is the Savin scale?

A refinement of the Ludwig Scale that adds density steps inside grades I and II and describes the frontal pattern. It is used when a chart needs more resolution than three grades, and the reference images on this page follow that system.

The Norwood Scale, for the male pattern →Hair transplant for women, when it works →PRP hair therapy →Find out what you need →