This study was designed to better assess the efficacy of PRP in hair loss, we therefore propose to study interval intralesional PRP injections for patients with androgenetic alopecia (AGA). Androgenetic alopecia is the most common form of hair loss world-wide. Although there are currently numerous treatment options for this indication including minoxidil, 5-alpha reductase inhibitors and follicular unit transplant, many of the medical treatment options have undesirable side effects, particularly in women of child bearing age. These well-documented adverse reactions include impotency, hypertrichosis, and birth defects.