Executive Summary & Operational Context
A "Repeat Breeder" is defined as a cow or buffalo that has normal estrous cycles (every 18-24 days), shows no clinically apparent genital disease, but fails to conceive after 3 or more consecutive artificial inseminations with fertile semen.
Administering 2.5 mL GnRH (Buserelin acetate) injection intramuscularly at the exact moment of AI increases conception by 20% to 25% by ensuring timely ovulation.
The 4 Hidden Causes of Repeat Breeding
1. Sub-Clinical Endometritis: Mild bacterial infection (E. coli, Trueperella pyogenes) inside the uterine lining without visible white discharge. Inflammatory cytokines kill the fragile 7-day embryo. 2. Delayed Ovulation: Ovulation delayed 24-36 hours past insemination; sperm cells die before the egg arrives. 3. Early Embryonic Death (EED): Progesterone hormone deficiency by the Corpus Luteum (luteal insufficiency) fails to maintain pregnancy past Day 16. 4. Faulty AI Technique: Thawing semen too slowly, rough passage through the cervix, or depositing semen into the vagina instead of the uterine body.
Proven Veterinary Treatment Protocol
Step 1: Check Cervical Mucus Whiteside Test: Add 1 mL cervical mucus to 1 mL of 5% NaOH solution and heat. If it turns yellow, sub-clinical endometritis is present. Treat with intrauterine infusion of Lugol’s Iodine (1:50 dilution) or Cephapirin (Metricure) 24 hours post-heat. Step 2: Overcome Delayed Ovulation with GnRH: Inject 2.5 mL Buserelin Acetate (Receptal / Gynarich) intramuscularly at the time of AI. Step 3: Support Corpus Luteum: Inject 500 mg Hydroxyprogesterone caproate on Day 4 and Day 8 post-AI to prevent early embryonic mortality.
How to Implement on Your Dairy Farm
Perform Whiteside Test on Clear Mucus
Screen for hidden uterine inflammation before wasting expensive semen.
Administer GnRH at AI
Have your veterinarian administer 2.5 mL Buserelin acetate right when the AI catheter is inserted.
Supplement Chelated Trace Minerals
Feed 60g chelated mineral mixture containing copper, zinc, selenium, and chromium for 30 days.
Recommended Breeds for this System
Related Dairy Guides in Breeding & Genetics
Sex-Sorted Semen in Dairy Farming: 90% Female Calf Rate, Cost & AI Technique
Heat Detection in Cows and Buffaloes: Standing Heat Symptoms & The AM-PM AI Rule
Embryo Transfer Technology (ETT) & IVF in Gir and Sahiwal Cattle: Procedure & Cost
FAQ
Frequently Asked Questions: Repeat Breeding in Dairy Cattle: Causes, Hormonal Protocols & Uterine Infection Cure
Need a Custom TMR Feed or Bank Loan Calculation?
Use our interactive ICAR-NDRI Total Mixed Ration calculator or explore Pashu KCC loan scales for all 73 Indian livestock breeds.