Exogenous melatonin advances the ram breeding season and increases testicular function

摘要

Scrotal circumference of melatonin implanted (-) and control ( ) Merino and Poll Dorset rams (n = 31) from study week 0 (prior to implantation) to study week 30 (following breeding season). Weekly values are presented as means ± S.E.M. *Indicates significant difference between treatment groups (P