The progesterone treatment alone, according to dosage regimen proposed, is not sufficient to induce oestrus and ovulation in all cycling females. Progesterone-based breeding protocols are reproduction management tools and should not replace adequate feeding and general health management. The choice of a specific protocol should be based on the requirements of the individual herd and it is advisable to examine for cycling ovarian activity before using the progesterone treatment.
The response of cows and heifers to progesterone-based synchronisation protocols is influenced by the physiological state at the time of treatment. Responses to treatment can vary either across herds or across cows within herds. However, the percentage of cows displaying oestrus within a given period is usually greater than in untreated cows and the subsequent luteal phase is of normal duration.
At operator's discretion, when synchronising cattle, trimming of the CIDR string may be of benefit in order to avoid removal by other animals.
For administration only by a veterinarian for the following indications:
For induction and synchronisation of oestrus in non-cycling cattle in Fixed Time Artificial Insemination (FTAI) protocols:
- To be used in combination with Gonadotropin releasing hormone (GnRH) or analogue and PGF2α or analogue.
- To be used in combination with PGF2α or analogue and equine chorionic gonadotrophin (eCG).