Microneedling and autologous concentrated growth factor (CGF) have established their potential effect in inducing hair regrowth. No study has compared the effect of microneedling and CGF in the treatment of female androgenetic alopecia (AGA).

Microneedling is a minimally invasive technique consisting of sterile microneedles for repetitive cutaneous puncturing that increase hair regrowth by growth factor release. Concentrated growth factor (CGF) is a form of platelet concentrate (PC) and concentrates higher levels of growth factors because of its varying programmed centrifugation process. Previous studies have showed that CGF injection in hairless scalp could enhance the hair density and optimize the hairless appearance in AGA patients. Both microneedling and CGF have established their potential effect in inducing hair regrowth. No study has compared the effect of microneedling and CGF in the treatment of female androgenetic alopecia.

Inclusion Criteria:

1. age between 18 and 65 years;；
2. clinical diagnosis of female pattern hair loss；
3. no previous laser treatments for AGA in the past six months before enrollment； 4) willingness to provide pictures and follow-up studies.

Exclusion Criteria:

1. if presented with severe diseases of internal organs, eyes, or skin;
2. inflammation, infection, or unhealed wounds on the skin around the site of treatment on the head;
3. systematic treatment with corticosteroids or other immunosuppressants and immunomodulators in the past 3 months.

The data that support the findings of this study are not publicly available due to the privacy of research participants but are available from the sponsor upon reasonable request.