Progesterone Research Institute

The Progesterone Research Institute (PRI) is a non-profit organization dedicated to supporting and promoting progesterone research and educating the public, physicians and researchers about the use of progesterone in particular and bio-identical hormone replacement therapy (BHRT) (also called natural hormone replacement therapy or NHRT) in general. It was founded by John R. Lee, M.D.

The PRI is currently creating a website,with the goal of being a noncommercial educational resource both for professionals and lay people, and it will continue to be an educational resource.

If you are interested in making a donation to the PRI, if you have suggestions or proposals for studies, if you know of grant money we can apply for, or if you would like to help us apply for a grant, you can send mail to:

The Progesterone Research Institute
30520 Rancho California Rd
Ste 107, PMB 257
Temecula, CA 92591
or send an e-mail to and on the subject line put : Attn: PRI
All donations are tax deductible.