| Type | MGI:General | Description | starting at 24 and 25 dpp, fusion of cells adjacent to the lumen is observed in a few tubules at 28 dpp, number of tubules with elongated spermatids is significantly decreased and multinucleated germ cells, but no mature spermatozoa, are present premature upregulation of genes normally expressed later in spermatogenesis and spermiogenesis is observed at 22 and 23 dpp EGFR and PDGFRA transcripts and ERK1/2 signaling are decreased in 22 dpp male germ cells |
