http://her2support.org/vbulletin/sho...ight=progestin
We've had many discussions over time here about the progesterone receptor (PR), natural progesterone, and synthetic progesterone. Because studies use the term "progestin", one can't always tell whether they are referring to the synthetic progesterone or the natural progesterone, and that has added confusion to our discussions.
Here are a few threads from the past:
http://her2support.org/vbulletin/sho...ight=progestin
and
http://her2support.org/vbulletin/sho...ight=progestin