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REPRODUCTION (FACTORS INVOLVE IN REPRODUCTION & BREEDING (PHOTOPERIOD…

- - - - OOGENESIS (Produce ovum)
      - OVULATION (Release ovum)
      - STEROIDOGENESIS (Produce hormone)
      - FERTILIZATION
      - PARTURITION (Giving birth)
      - ESTRUS (sexual receptivity period in mammals)
      - PREGNANCY
      - IMPLANTATION
      - MENSTRUAL CYCLE
    - - OVARY (produce ova / hormones)
      - OVIDUCT (transport ovum)
      - UTERUS ( implantation site for embryo)
      - CERVIX (act as protection)
      - VAGINA (copulative organ)
      - VULVA (external opening)
  - - - Testis
        
        By hypothalamus
        
        Spermatogenesis
        
        At seminiferous tubule
        
        Contain spermatogonia
        
        Sertoli cells
        
        Steroidogenesis
      - Accesory organs
      - Ducts
      - Penis
    - - Low sperm count
        
        Decreased LH, FSH
        
        Blockages
      - Impotency
        
        Physical damage
        
        Health and medication
        
        Psychological problem
- - - - Gonadotropin releasing hormones (GnRH)
        
        changes pattern of secretionof LH & FSH
    - - Luteinizing Hormone (LH)
        
        Stimulates corpus luteum
        
        Production of corpus luteum will produce PROGESTERONE
      - Folicular stimulating hormone (FSH)
        
        Stimulates follicle growth in the ovary
        
        Produce ESTROGEN HORMONE
  - - - Respond to decrease photoperiod
      - Sheep / goats
    - - Respond to increase photoperiod
      - Horses / cats
    - - PINEAL GLAND
        
        Secretes MELATONIN
        
        MELATONIN - determines breeding season in seasonal breeders
- - - - Stimulates testis
        
        Sperm and inhibin
    - - Stimulates testis
        
        Produce testosterone
  - - - Indirect action
    - - Direct action