TLDR Hair loss and growth can be accurately measured using computer-assisted counting.
The document describes a study by The Upjohn Company that measured hair density in the frontoparietal area of the scalp of women without androgenetic alopecia. The study found that the number of nonvellus hairs was similar in each quadrant of the scalp, and accurate assessment of hair loss and growth could be achieved using a computer-assisted hair-counting technique. The study involved 62 subjects and was conducted 32 years ago.
58 citations,
October 1993 in “International Journal of Dermatology” Minoxidil helps hair growth and reduces shedding in women.
82 citations,
March 1994 in “Archives of Dermatology” 2% topical minoxidil effectively treats female hair loss with minimal side effects.
219 citations,
March 2004 in “Journal of The American Academy of Dermatology” 5% and 2% minoxidil solutions effectively promote hair growth and reduce hair loss, with 5% being slightly more effective but having more side effects.
21 citations,
May 2016 in “The Cochrane library” Topical minoxidil helps treat female pattern hair loss, but more research needed for other treatments.
100 citations,
June 2011 in “Journal of The American Academy of Dermatology” 5% minoxidil foam once daily works as well as 2% minoxidil solution twice daily for female hair growth and is more convenient.
