PregSynch 200 cow pack

PregSynch 200 cow pack

200 cow treatment pack containing Cyclase and Gonasyn 


  • Cyclase contains cloprostenol - proven prostaglandin for cattle

  • Can be used as the diluent for Novormon eCG in anoestrus treatment programs

  • The only 2mL Gonadorelin dose in New Zealan

  • Gonasyn uses the proven GnRH analogue

  • Gonasyn offers 50 and 10 dose packs

  • Both Cyclase and Gonasyn are supplied in plastic 100ml bottles in this pack


  • Most popular and proven prostaglandin analogue in New Zealand cattle

  • Dose surety via simple 2mL program, reducing likelihood of errors

  • Gonadorelin is proven in GPG programs

  • Flexibility especially for dispensing final GnRH injection


Each 200 cow pack contains 400 x 2mL doses of Gonasyn (GnRH), and 200 x 2mL doses of Cyclase along with quality, branded, bottle mounted injector guns for each injection.

Pack Sizes

PregSynch 200 cow pack contents:

8 x Gonasyn (GnRH) 100mL (50 dose) plastic vials 
1 x branded 2mL bottle mount injector and needle
4 x Cyclase (PG) 100mL (50 dose) plastic vials 
1 x branded 3mL bottle mount injector and needle


PregSynch, DIB-Synch, and DIB-Synch Plus programs

The PregSynch (GPG) program is generally administered with a progesterone insert such as a DIB-V or DIB-h.  
NZ research shows that the combined progesterone insert and PregSynch programs have the best chance of getting non-cycling dairy cows to ovulate and conceive promptly (via a DIB-Synch Plus Program), with resultant higher pregnancy rates. 
Use PregSynch programs in tandem with a progesterone insert to synchronise cycling heifers or cows, so that all animals can be inseminated on the same day with good conception rates to AI.
Another option is using PregSynch without a progesterone device (this program is also known as ovsynch or GPG) with non-cycling dairy cows.  This program is cheaper, but as pregnancy outcomes are lower it makes better economic sense to add a progesterone insert to the program each time.  This is because substantially more milk is produced from the higher proportion of cows in-calf earlier with DIB-Synch Plus.


Gonasyn and Cyclase are New Zealand restricted vet medicines. Please contact your veterinarian for advice on the best program for your herd.