Maybe increased melatonin increases test levels? Junk, you may have something there...
Title: Testicular activity is restored by melatonin replacement after suprachiasmatic nucleus lesion or superior cervical ganglionectomy in mink.
Author, Editor, Inventor: Maurel-Daniel-L {a}; Ben-Saad-Mohamed-Moncef; Roch-Gisele; Siaud-Philippe
Author Address: {a} Pathologie de l'Oreille interne et Rehabilitation, EPI 9902 INSERM, Faculte de Medecine Nord, Boulevard Pierre-Dramard, 13916, Marseille Cedex, 20; E-Mail:
[email protected], France
Source: Journal-of-Pineal-Research. [print] January, 2002; 32 (1): 15-20.
Journal URL:
http://journals.munksgaard.dk/tidss...l+of+Pineal+Research/aimandscope?OpenDocument
Publication Year: 2002
Document Type: Article-
ISSN (International Standard Serial Number): 0742-3098
Language: English
Abstract: Subcutaneous melatonin implants were inserted in mink subjected to natural (autumn) or experimental gonadostimulatory short-days (4L:20D), after lesion of the suprachiasmatic nucleus (SCNx) or after superior cervical ganglionectomy (SCGx). Gonad stimulation was assessed by measuring testicular volume and plasma testosterone level. In SCNx and SCGx animals, all measurements were indicative of sexual quiescence. In contrast, both SCNx and SCGx animals with melatonin, maintained in natural or experimental gonadostimulating short-days, showed an increase in testicular activity 2 months after melatonin implantation. Thus, melatonin (and pineal activity) is a prerequisite for the photoperiodic stimulation of reproductive activity, and the SCN is not necessarily the target site for melatonin action on the renewal of reproduction in the mink.
There were a few of these studies done on various animals, but i can't find any about humans...I'll keep looking though.