ABG Reproductive Physiology and Artificial Insemination

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					ANP502:
REPRODUCTIVE
PHYSIOLOGY
       Introductory Lecture
TERM PAPER


INFERTILITY IN
 FARM ANIMALS
Lecturers

 O.M. Onagbesan
 A.O. Ladokun
 I.J. James
 O.A. Osinowo
Defining Animal Reproduction


 Animal reproduction: Process by which offspring are produced by
   male and female parents.
 Involves heterosexual mating, conception, pregnancy, parturition
   and lactation.
 Conception results from fusion of male and female gametes (i.e.
   spermatozoon and ovum), known as fertilization.
 Animals must first attain reproductive age (puberty) before being
   capable of producing gametes.
 Reproduction involves close coordination of various physiological
   events to be successful. This is usually achieved through the action
   of reproductive hormones.
Interdisciplinary nature of
Animal reproduction

 Proper understanding of animal reproduction requires knowledge in
   diverse fields such as:


   Reproductive physiology, endocrinology,
   environmental physiology, cell biology,
   immunology, genetics, biochemistry, sociology,
   reproductive diseases, psychology, embryology,
   obstetrics and so on.
Animal reproduction and
economic livestock production

 Livestock products such as milk and eggs are directly
  from reproductive processes.

 Meat production depends on production of young
  animals (reproduction) for growing and fattening.

 Profitability of livestock enterprise largely depends on
  reproductive efficiency.
Role of reproduction in genetic
improvement




                 where
   DGy = SD *
            h2
           GI    SD = selection differential
                 h2 = heritability estimate, and
                 GI = generation interval in years.

				
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posted:5/22/2011
language:English
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