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how sperm is made sperm production how sperm is made in the human body what is sperm count sperm production per day sperm production cycle vasectomy sperm production time reproductive anatomy how is sperm produced what is sperm spermatogenesis spermatogonia seminiferous tubules vas deferens ductus deferens rete testis epididymis teste testis efferent ductules of testis human anatomy real human body institute of human anatomy how much sperm per day