Androgenetic alopecia is the common inherited form of pattern hair loss. It affects both men and women, although the typical distribution differs.
In men, the temples and frontal hairline often recede and the crown becomes thinner. In women, the central parting often widens and density over the top of the scalp decreases.
Genetic susceptibility and androgen sensitivity of hair follicles play important roles. Affected follicles gradually produce finer hairs over successive cycles.
A classic pattern can often be recognised clinically. In women, atypical patterns or associated symptoms may justify additional investigation.
Photographs can be highly informative, but suspected scarring or inflammatory hair disease may require trichoscopy or in-person dermatology.
Treatment is optional rather than medically mandatory. minoxidil can slow loss and support growth in some men and women. finasteride may be considered in men after an individual discussion of benefits, contraindications and potential adverse effects.