hanna
Andreas site is a good idea, the only thing is, he is so behind because of working 12 hours a day, so give it some time.
I wonder if Julia Chang's website has any referrence to it, she has information on hormones.
http://www.sensiblehealth.com
Interesting that you brought up the subject, I can't remember noticing the same question on the forums before. On the other hand I am a senior citizen so I might have missed reading it :).