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Reproductive technology in animal production
1John Curtin School of Medical Research, Australian National University, Division of Clinical Sciences, Canberra City, ACT.
Revue Scientifique Et Technique (International Office of Epizootics)
|September 1, 1990
Summary
Hormonal treatments and biotechnologies enhance farm animal reproduction. Techniques like embryo transfer, sex determination, and cloning offer new avenues for increasing livestock productivity and genetic improvement.
Area of Science:
- Reproductive physiology and embryology
- Animal biotechnology
- Livestock production
Background:
- Physiological and embryological research underpins technologies for farm animal productivity.
- Reproductive control technologies are crucial for efficient livestock management.
- Existing methods aim to improve breeding efficiency and reproductive outcomes.
Purpose of the Study:
- To review advancements in reproductive technologies for farm animals.
- To highlight methods for enhancing control of reproductive function and productivity.
- To explore potential applications in genetic improvement and livestock management.
Main Methods:
- Hormonal treatments: Progestagens, gonadotrophins (PMSG, GnRH), and melatonin for estrus synchronization and breeding induction.
- Biotechnologies: Embryo transfer, in vitro fertilization, sperm sorting, and DNA-based sex determination.
- Reproductive diagnostics: Real-time ultrasonic scanning and pregnancy-specific protein identification.
- Advanced techniques: Embryo bisection for monozygous twinning, cloning, and chimera production.
Main Results:
- Hormonal treatments effectively control estrus, hasten puberty, and reduce postpartum anoestrus in various livestock species.
- Embryo transfer and in vitro fertilization facilitate twinning and embryo sourcing.
- Pregnancy diagnosis is reliable using ultrasound and potentially serological tests.
- Sex determination of embryos and production of identical twins and clones are feasible.
- Immunization against inhibin shows promise for increasing fecundity.
Conclusions:
- Reproductive technologies offer significant potential for increasing farm animal productivity and efficiency.
- Advanced techniques like cloning and chimera production are rapidly developing for genetic engineering.
- Further research is needed to optimize the application of these technologies for genetic improvement programs.