research Drugs Affecting Hair Growth January 1990 Different hair growth phases affect how follicles respond to X-rays, and hormones like testosterone and dihydrotestosterone play a key role in baldness; transplanted hair can grow on bald scalp areas.
research Role of Insulin-Like Growth Factor-1 Receptor in Female Androgenetic Alopecia January 2020 in “Menoufia Medical Journal” IGF-1R may play a role in female hair loss and could be a treatment target.