Unfortunately, the results of PRP treatment for hair regrowth are not permanent. Nothing can change your genetic predisposition for hair loss and hair loss will return if no maintenance type treatment is done.
Most patients with female pattern hair loss who respond to PRP hair loss treatment, require repeat treatment anywhere between 12–24 months after their initial treatment.
As with your initial treatment, it may take another three to six months to see measurable improvement in hair density.
Subsequently, PRP may need to be repeated periodically depending on your individual response to PRP therapy, your genetics, the extent of your hair loss and if you are using any other adjunctive treatments, such as Philip Kingsley Thrichotherapy Regime, with your PRP hair loss treatments.
Additional treatment frequency will also depend on your hair treatment goals.