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Male Reproduction... (Accessory sex glands (Produce seminal plasma, NOT…

- - - - Primary then secondary Spermatocytes
        
        Spermatids
        
        Mature spermatazoa
  - - - Age at which first ejaculation
      - Age when spermatazoa first appear in ejaculate
      - When ejaculate contains sufficient spermatazoa to fertilise
      - Age when behavioural traits displayed
    - - BRAIN
      - Factors?
        
        Social conditions
        
        Weight
        
        Age
        
        Met. status
        
        Photoperiod