Hmmm.... Typically stage four lasts the longest and from four to five might be the hardest to push through. Progesterone might help with the final stages a lot. After starting PG, soon followed by some other things such as glandular therapy and quitting smoking, I very quickly went from late stage three to early stage four which has now continued for about 4-5 months and still keeps on going. My plan is to keep this current amazing development going as long as possible, no idea when and what it takes to get through to stage five.
Progesterone can be the key to this.