In the case of benign prostatic hypertrophy, there was a significant rise in inhibin levels as compared to age-matched control groups, whereas LH and FSH levels were decreased significantly.
http://onlinelibrary.wiley.com/doi/10.1002/pros.2990100203/abstract
- The levels of inhibin and prolactin were significantly reduced after surgery, but no consistent changes in LH, FSH, or TSH levels were noted.
Serum and urinary prostatic inhibin-like peptide in benign prostatic hyperplasia and carcinoma of prostate.
https://www.ncbi.nlm.nih.gov/pubmed/2462465
Prostatic inhibin-like peptide (PIP) in the serum was significantly elevated serum PIP levels in benign prostatic hypertrophy.
Stress can exacerbate BPH
http://www.sciencedirect.com/science/article/pii/S1756464613001308