Oestrus Synchrony

Oestrus synchrony programs involve administration of a program of treatments for sexually mature and cycling cows and heifers, which results in this group of animals coming into heat (oestrus) and ovulating at approximately the same time. 

There are two main programs for synchronising heifers. Double PG is only a viable option when (i) animals are ovulating (having reached puberty) and (ii) heat detection and AI is available for a minimum of four days. In most scenarios, DIB Co-Synch will provide a superior return on investment for NZ dairy heifers or beef cows due to the superior expected pregnancy outcomes with this program. 

The benefits of synchronising dairy heifers are:

• - An additional 3% of heifers pregnant at the end of the mating period
  
• - Conceiving 11 days earlier, which will result in heifers calving 11 days earlier. For farmers, this means 11 additional days in milk and higher total milk production
• - 11 additional days for recovery after calving prior to the next mating period
• - Tighter calving spread which is simpler to manage for farmers
  
• - Faster genetic gain

See the link to our DIB Co-Synch Farmer Flyer for heifer synchrony here. 
View our latest Technical Bulletin on Heifer Synchrony reproductive outcomes, productivity and profitability here.

Program timer for heifers synchronised with DIB Co-Synch:

Program timer for beef cows synchronised with Beef-Synch:

An alternative program where AI occurs at the same time as final Gonasyn injection is also acceptable for beef heifers. A ten day program is also suitable for beef cows where cows are inseminated to detected heat from Day 7 onwards, the Gonasyn injection is given in the afternoon of Day 9, and cows are inseminated on the morning of Day 10 (within 16 hours of Gonasyn injection).

Check out our NEW Technical Bulletin, TB R19 Pregnancy rates following synchrony programs in beef cows here.
See the link to our Beef-Synch Farmer Flyer for beef synchrony here. 
See the link to our Superior comfort DIBs Farmer Flyer here.
Check out a summary of our Repro Programs here. 

See the latest news story by viewing the introductory video below: