Additionally, an immunocytochemistry study led by Herbert et al. (2007) noticed the age-related differences in OXTR staining within the human prostate (n = 4), i.e., weak staining in 9- and 18-year-old young men and strong staining in 28- and 33-year-old men and BPH patients (n = 10; age range = 54–75 years) [48]. This evidence concerns the gene OXTR and benign prostatic hyperplasia.