Am I understanding this correctly? It says the leydig cells produce opiates.
The effects of opioid receptor antagonists suggest that testicular opiates regulate Sertoli and Leydig cell function in the neonatal rat -- Gerendai et al. 118 (5): 2039 -- Endocrinology
The effects of opioid receptor antagonists suggest that testicular opiates regulate Sertoli and Leydig cell function in the neonatal rat -- Gerendai et al. 118 (5): 2039 -- Endocrinology