You may very well be right, LONE_AZ.
I also wanted to say that I recall at one point I took issue with your position that prolactin and progesterone can't cause gyno without estrogen. Since then I've come around to share your position.
Progesterone and prolactin, as well as IGF-1 all act as factors to stimulate breast tissue growth, but lots of experiments (in mice lacking estrogen receptors, for instance) point to the fact that estrogen is the critical component in gyno.
There is an excellent summary ot these ideas at:
http://www.endotext.org/male/male14/male14.htm
I also wanted to say that I recall at one point I took issue with your position that prolactin and progesterone can't cause gyno without estrogen. Since then I've come around to share your position.
Progesterone and prolactin, as well as IGF-1 all act as factors to stimulate breast tissue growth, but lots of experiments (in mice lacking estrogen receptors, for instance) point to the fact that estrogen is the critical component in gyno.
There is an excellent summary ot these ideas at:
http://www.endotext.org/male/male14/male14.htm