Serum testosterone, estradiol, and steroidogenesis-related gene expression levels in Hu sheep with different scrotal circumference

• LIU Jiamei, 
• LU Tingting, 
• YAO Ting, 
• YAO Rongyu, 
• LI Fadi, 
• YUE Xiangpeng, 
• LI Wanhong