Spermatogenesis

                        SPERMATOGENESIS
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Spermatogonium (2n)  
      │  
  (Mitosis) ──► Stimulated by **FSH**
      ↓  
Primary Spermatocyte (2n)  
      │  
  (Meiosis I)
      ↓  
Secondary Spermatocyte (n)  
      │  
  (Meiosis II)
      ↓  
Spermatid (n)  
      │  
  (Spermiogenesis) ──► Promoted by **Testosterone**
      ↓  
Mature Sperm (n)  
      │  
  (Spermiation – release into lumen)

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✧ Hormonal Regulation:
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→ **FSH** (Follicle-Stimulating Hormone):  
   - Stimulates **Sertoli cells** to support spermatogenesis  
   - Initiates division of **spermatogonia**

→ **LH** (Luteinizing Hormone):  
   - Stimulates **Leydig cells** to secrete **Testosterone**

→ **Testosterone**:  
   - Promotes meiosis and maturation of spermatids into sperm

→ **Inhibin**:  
   - Inhibits FSH secretion to regulate sperm production

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