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REPRODUCTIVE TECHNIQUES
AND STRATEGIES
Terence John P. Aguinaldo
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Artificial Insemination (AI): Maximizing Genetic Potential
A reproductive technology where
sperm is manually inserted into the
female reproductive tract without
natural mating.
Advantages
✅ Genetic Improvement
✅ Disease Control
✅ Cost-Effective in the Long Run
✅ Better Record Keeping
✅ Increased Safety
Process
Collection, evaluation, preservation,
and insemination of semen.
Disadvantages
❌ Requires Skilled Personnel
❌ Higher Initial Costs
❌ Lower Conception Rates
❌ Requires Estrus Detection
❌ Limited
Genetic Diversity
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Estrus Synchronization
Methods
A technique used to control and synchronize
the estrous cycle in a group of female
animals for more efficient breeding.
• Hormonal treatments
(Prostaglandins, Progestins, GnRH)
• Timed AI programs
Advantages
Disadvantages
✅ Efficient Breeding Management
✅ Higher Conception Rates
✅ Labor and Time Savings
✅ Uniform Offspring
✅ Optimized Use of AI
❌ Cost of Hormonal Treatments
❌ Requires Skilled Management
❌ Variable Response Rates
❌ Risk
of
Side
Effects
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❌ May Not Always Be Cost-Effective
Embryo Transfer (ET)
🧬Embryo Transfer (ET) is a reproductive technology where fertilized
embryos from a genetically superior female (donor) are collected and
transferred to a recipient female for gestation.
✅ Purpose:
•Rapid genetic improvement
•Increase offspring from high-value females
•Enhance breeding efficiency
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Embryo Transfer (ET)
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Sexed Semen Technology
🧬Sexed Semen Technology is a reproductive technique
that allows the selection of sperm carrying either X
(female) or Y (male) chromosomes to predetermine the
sex of offspring before fertilization.
✅ Purpose:
•Control the sex ratio in livestock breeding
•Improve herd management and productivity
•Enhance genetic selection for dairy and meat
production
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Sexed Semen Technology
🔬 Step-by-Step Process:
1️⃣ Semen Collection
2️⃣ Semen Staining
3️⃣ Flow Cytometry Sorting
4️⃣ Semen Processing & Freezing
5️⃣ Artificial Insemination (AI)
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Sexed Semen Technology
Advantages
Disadvantages
✅ Predetermined Offspring Sex
❌ Lower Conception Rates
✅ Increased Efficiency in Herd Management ❌ Higher Costs
✅ Improved Genetic Selection
❌ Requires Skilled Handling
✅ Reduces Unwanted Offspring
❌ Sperm Damage Risk
✅ Better Resource Utilization
❌ Limited Availability
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Pregnancy Diagnosis: Early Detection for Improved
Management
Palpation
>90% after 35 days gestation
Ultrasound
Early detection (from 28 days)
Hormonal Assays
Detect pregnancy as early as 21 days
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Pregnancy Diagnosis Tools and Methods
Ultrasound
Imaging of the fetus, fetal heartbeat
Hormonal Assays
Analysis of serum progesterone levels
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Fertility Troubleshooting: Addressing
Reproductive Issues
Hormonal Imbalances
Infectious Diseases
2
3
Nutritional
Deficiencies
Anatomical
Abnormalities
1
4
Case Studies: Successful Implementation
Embryo Transfer in Philippine Dairy Buffaloes at Philippine
Carabao Center (PCC)
Background
•Location: Philippine Carabao Center (PCC) at CLSU, Nueva Ecija
•Objective: Improve milk production through elite genetic buffaloes
•Problem: Limited availability of high-producing dairy buffaloes
Methodology
•Superovulation of donor buffaloes
•Embryo collection & transfer to synchronized
recipients
•Fresh and frozen embryo transfer used
•Monitoring via ultrasound
Results
•61% pregnancy rate (fresh embryos)
•48% pregnancy rate (frozen embryos)
•Significant increase in milk yield (from ~4 L/day
to 8–12 L/day)
Learn 500
More calves born under the program
•More than
(2010–2020)
Case Studies: Successful Implementation
Estrous Synchronization and Fixed-Time AI in Beef Cattle in
Bukidnon
Background
•Farm: CMU Livestock Project & Private Ranches in Bukidnon
•Objective: Improve calving rate and shorten calving interval
•Problem: Poor heat detection and low natural breeding efficiency
Methodology
•Estrous Synchronization using PGF2️α and
CIDR protocols
•Fixed-Time Artificial Insemination (FTAI)
•Applied to 200+ cows in smallholder and
commercial farms
Results
•Conception rate: 55–60%
•Calving interval reduced by 30–45 days
•More uniform and earlier calving season
Learn
•Adapted
byMore
nearby ranchers and cooperatives
Case Studies: Successful Implementation
Sexed Semen Technology in Dairy Cattle at Batangas Dairy Cooperative
Background
•Cooperative: Batangas Dairy Cooperative (BDC)
•Objective: Produce more heifer calves for herd expansion
•Problem: Shortage of replacement females
Methodology
•Sexed semen (X-chromosome sorted) used in
AI
•Targeted to first-lactation and heifers
•Combined with Estrous Synchronization for
better timing
•Carried out by PCC-trained AI technicians
Results
•Female calf ratio: 87–90%
•Conception rate: 45% (sexed) vs. 60%
(conventional)
•Herd replacement
rate increased by 15%
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•Reduced dependency on buying replacement
animals
Optimizing Reproductive Success
1
2
3
Proper Management
Accurate Diagnosis
Skilled Technicians
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More
Reproductive technologies are powerful tools. They
enhance
fertility and breeding
programs.
Key Takeaways
Reproductive
technologies enhance
breeding programs.
These provide powerful
means for improvements.
Economic benefits
drive adoption.
It increases productivity
and profitability.
Management and skilled technicians are vital.
These are key for successful outcomes.
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References
•Mapletoft, R. J., et al. (2013). "Embryo transfer in cattle."
•Bo, G. A., et al. (2016). "Fixed-time AI and synchronization programs."
•DeJarnette, J. M., et al. (2009). "Pregnancy outcomes using sexed semen."
•Baruselli, P. S., et al. (2018). "Reproductive management in cattle."
•FAO (2010). "Guide to Good Dairy Farming Practice."
•Johnson Dairy Farm and GreenPasture Dairy (Internal Reports, 2022)
•Philippine Carabao Center (2020). "Annual Report."
•DOST-PCAARRD (2019). "Reproductive Biotechnologies in Philippine Livestock."
•Barroga, A. J., et al. (2018). "Adoption of Estrous Synchronization in Bukidnon."
•DA-NDA (2020). "Sexed Semen Utilization in Dairy Cooperatives."
•PCC CLSU Technical Bulletins
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