Résumé : Androgenetic alopecia is the most frequent alopecia both in men and women. Despite it affects a large proportion of the population, they are few therapeutic options often restrictive. The injection of PRP in alopecic areas is a new and easy therapeutic option. The aim of this article is to systematically review the literature about this topic by analysing the articles describing the clinical results of this new technique in the treatment of androgenetic alopecia in men and / or women with a follow-up of minimum 6 months.