Effect of morning and evening injections of melatonin on the testis of toad (Bufo melanostictus)

SUMANTRA CHANDA, N. M. BISWAS
1982 Endocrinologia Japonica  
Melatonin injection either in the morning or in the evening decreases spermatogenesis as well as the Leydig Cell nuclear area in toad, whereas if administered twice daily (morn-ing+evening) it shows no such effect.
doi:10.1507/endocrj1954.29.483 pmid:7151747 fatcat:we2rcykjrfen3byywrztnbmh6m