Hello,
To be honest, if you're concerned about maintaining your functionality, especially fertility, I think it would be best to avoid NBE. YMMV, but it may take anywhere from a few weeks to a few months before you experience a decline or recovery of functionality. If you want to grow breasts, I say be prepared for a continuing drop in functionality.
For me I noticed a change within a few weeks of taking pm. I'm not sure about testicle shrinkage, but a decline in libido was obvious to me. I can't remember the last time I had a morning or involuntary erection. Now after 16+ months of taking pm, my libido is merely a remnant of what it was during my pre-NBE days.
Here's a thread I recommend reading if you're curious about the long-term effects users have experienced with pm:
http://www.breastnexus.com/showthread.php?tid=16279
This post was last modified: 05-09-2013, 03:34 AM by flamesabers.