The results showed that the alveolar and ductal epithelial of non -pregnant dairy goats in control period were less than that in experiment period.

• 结果表明,空怀奶山羊对照期乳腺的腺泡很少发育,几乎看不到乳导管,试验期乳腺有明显导管生长和少量腺泡发育;