Androgenetic alopecia is the medical term for the most common form of hair loss — what is popularly called male pattern baldness in men and female pattern hair loss in women. Understanding exactly what the term means helps patients move from a vague awareness of hair loss to a specific understanding of what is happening in their scalp and why.
Androgenetic alopecia has two components in its name: androgenic — relating to androgens (male sex hormones, specifically dihydrotestosterone or DHT) — and genetic — inherited predisposition. The condition occurs when genetically susceptible hair follicles are exposed to DHT and respond by progressively miniaturising.
The androgenic component explains why the condition is treated with anti-androgen medications like finasteride. Reducing DHT levels — the androgenic driver — slows or halts the miniaturisation process in susceptible follicles.
The genetic component explains why the condition runs in families and why it cannot be prevented through lifestyle changes alone. The genetic variants that determine follicle sensitivity to DHT are inherited — you cannot change your genetic predisposition, though you can manage its expression through treatment.
Androgenetic alopecia is a progressive condition — it does not spontaneously reverse without treatment and does not plateau permanently at any given stage. The rate of progression varies enormously between individuals — some men progress rapidly from Norwood 2 to Norwood 5 in their twenties; others remain at Norwood 3 for decades.
Treatment is available and effective. The condition is manageable. Understanding what it is and what drives it is the first step toward making informed treatment decisions.
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