The Effect of Alpinia Galanga Extract to Seminiferous Tubular Epithelial Thickness and Seminiferous Tubular Diameter of Male Mice Induced to Lead Acetate Muhammad Rizqi Pratama, Sri Mulyati, Sri Pantja Madyawati, Dewa Ketut Meles, Eduardus Bimo Aksono Herupradoto, Epy Muhammad Luqman* Abstract The purpose of this research was to determine the