@DeborahFfrench @Anfractuous_ Okay, I am doing some light research here at the moment:
LexiComp states the main, labeled use for cyproterone acetate is for treatment of prostate cancer (end stages). It states after 2 months of treatment, infertility may be noted and before that sperm count can be lowered--but this does not appear to be permanent because...
The drug has been used in precocious puberty:
The goal is to suppress puberty until the child is at an appropriate age--not to prevent it from occurring so this would make me think any effects of the medication (like with most hormones) is temporary.
I am also trying to figure out when this drug first appeared on the market--was it even available in the early 1970s?
Micromedex lists the drug as being used for acne, in a low dose, for girls only. The dosing for acne is much lower than that of other uses. I am scanning Micromedex now for more information (it is very in-depth).
I will try to find that article, BTW, I may or may not have access to it.
I will continue to investigate but right now it is hard for me to tie permanent larynx growth suppression to this hormone--not to mention Michael's larynx did in fact grow and grow normally.
Michael was 100% male--facial hair, body hair, Adam's apple, typical male build, genitalia normal (and an enlarged prostate, typical of 50 year old men), etc. You cannot only affect the larynx w/o effecting those systems, too. Plus, "chemical castration" is temporary, if I recall right. If you stop the medications/hormones, the patient is no longer "castrated", as with a woman who stops birth control--it is temporary.