["Early germ cell development is deranged in undescended testis, potentially leading to infertility and cancer. Androgens are proposed to regulate gonocyte transformation into stem cells during human 'minipuberty' at 3-12months. We studied genes expressed in germ cells, Sertoli cells, and other somatic cells to determine whether androgen mediates gonocyte transformation.", 'Testes from androgen-receptor knockout (ARKO) and wild-type (WT) littermates were collected at postnatal day P0 (birth), P4, P8 for real-time PCR to measure gene expression of mouse VASA homolog (Mvh), anti-Mullerian hormone (Amh), kit oncogene (c-Kit), matrix metalloproteinase-1 (Mt1-mmp), zinc finger, and BTB domain-containing 16 (Plzf) and octamer-binding protein 4 (Oct4). Data were normalized to ribosomal protein L32 (Rpl32), and reproductive homeobox gene 5 (Rhox5) was a positive control for androgenic response. Changes in gene expression were calculated with GraphPad Prism 5.02.', 'There were no statistical differences (p>0.05) in Mvh, Oct4, c-Kit, Plzf, Amh and Mt1-mmp expression between WT and ARKO testes from P0 to P8.'] Is gene expression during gonocyte transformation into spermatogonial stem cells androgen dependent?