Brief Report – Body and Facial Hair Growth

Almost all transsexuals notice significant changes in their body and facial hair as a result of hormone therapy, but with a wide variation in results. Some may only notice a slight lessening of hair after two years, or (like the author) they may be fortunate and find entire regions of their body clear of hair. Therefore it is vital that as you read these reports, you understand that your results may not align with the results which are discussed.
TranswomenOne study with good management of the test subjects and controls examined the change in body hair and facial hair for transsexual women and men. There were 21 transwomen (all Caucasian, from age 20-44) who underwent an assessment of their body and facial hair density, growth rate, and diameter. All subjects were tested before starting hormone therapy, and at 4-month intervals up to one year from the start of hormones. All subjects were monitored on their cheek and upper abdomen. Over the 12-month period transwomen saw significant decreases in hair growth rates on their cheek and abdomen, with a mean reduction of 29% on their cheek and 50% on their upper abdomen. Hair density (hairs per square inch) decreased by 44% on their cheek and 50% on their upper abdomen. Hair diameter decreased by 20% on their cheek and 45% on their upper abdomen. Most of the changes were gradual over the 12-month period. (Giltay)TransmenIn the study by Giltay and Gooren there were 17 transmen (all white, from age 18-37) who underwent an assessment of their body and facial hair density, growth rate, and diameter. All subjects were tested before starting hormone therapy, and at 4-month intervals up to one year from the start of hormones. All subjects were monitored on their cheek and upper abdomen. Over the 12-month period transmen saw significant increases in hair growth rates on their cheek and abdomen. Here the results are somewhat skewed, as essentially no hair other than fine vellus hair existed on the cheeks and upper abdomen of the transmen prior to hormone therapy. Hair growth and density on the cheeks of transmen achieved the same levels as those of genetic males within 12 months, although the hair diameter was only 50% of that of a genetic male. Upper abdomen hair achieved a similar growth rate and density as that of genetic males, but hair diameter was about 40% of that of a genetic male. Hair growth rate rapidly accelerated in the first 4 months, but hair density and diameter increased more gradually over the 12-month period. (Giltay)
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