Hi Harpreet,

To my knowledge there is no environmental contaminant that is progesterone. It is made from a vegetable base but it requires human or animal specific biochemical transformation to become an active hormone.

Now to your question--progesterone in physiological (luteal phase) quantities as in the normal woman's menstrual cycle will suppress LH and FSH in men and thus decrease fertility.

Hope this is helpful for you,

All the best,

Jerilynn C. Prior BA, MD, FRCPC ABIM, ABEM, Professor of Endocrinology and Metabolism at the University of British Columbia

[email protected]

www.cemcor.ca

Thank you,

Jerilynn

Progesterone should only be administered under the care of a knowledgeable physician.  Not everyone feels good on progesterone.  One man wrote that "I tried using a very small amount of progesterone cream but even the recommended small amount for men made me feel lousy the following morningm so I stopped using it after only a few days." [9] In addition, please read my page on The Potential Dangers of Progesterone for additional important information.

1. 5-Alpha-Reductase Inhibition.  This enzyme is responsible for converting testosterone into DHT.  DHT is a powerful hormone in males and is responsible in part for libido, muscle growth and many other male functions.  However, too much DHT can be hard on the prostate and lead to hair loss.  Progesterone, which decreases with aging, is a significant inhibitor of 5-alpha reductase. [2]

2. Erectile Dysfunction Treatment.  There are some anecdotal reports, admittedly from non-peer reviewed sources, that indicate that progesterone can be a near miraculous cure for some men with erectile dysfunction, especially when combined with HRT (testosterone therapy).  I cover this in my page on Progesterone and Erectile Dysfunction.

http://www.reproduction-online.org/content/137/3/439.full

 thank you all for answering my question. This information is very helpful for me. thanks alot