Dairy Synchronization

  Cows: PreSynch

Presynch Timeline
  • Recommended for expressed and timed insemination of dairy catttle
  • Two Injections of PGF 14 and 28 days before the first GnRH improves pregnancy production.
  • Shots can start 38 days prior to end of voluntary waiting period. (VWP)
    • Example: VWP = 60, Begin Presynch program at 22 DIM
  • Opportunity to inseminate animals exhibiting estrus following 2nd PGF
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