In addition to investigated the effect of serum concentration on growth of somatic cells and spermatogonial cells,the isolated spermatogonial cells were cultured in the DMEM supplemented with 0%, 2.5%, 5%, or 10% FBS.

• 实验采用含0%25、2.；5%25、5%25和10%25血清的培养液对精原细胞进行培养；观察血清浓度对精原细胞和支持细胞生长的影响。