𝗣𝗧 𝗩𝗶𝗯𝗲𝘀 | 𝗣𝗵𝘆𝘀𝗶𝗰𝗮𝗹 𝗧𝗵𝗲𝗿𝗮𝗽𝘆
GH & PL are important for early division of spermatogonia.
Mahmood Raft, 

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