CIDR is presented as a “T” shaped device consisting of a progesterone impregnated silicone elastomer moulded over an inert nylon spine. Each device contains 1.38 g progesterone.

For the control of the oestrous cycle in cycling cows and heifers, including:

- Synchronisation of oestrus in groups of animals.

- Synchronisation of donor and recipient animals for embryo transfer.

To be used in combination with prostaglandin F2α or analogue.

Use as recommended normally results in oestrus 48-96 hours after device removal with the majority of animals showing oestrus within 48-72 hours.

For induction and synchronisation of oestrus in Fixed Time Artificial Insemination (FTAI) protocols:

- In cycling cows and heifers. To be used in combination with prostaglandin F2a (PGF2α) or analogue.

- In cycling and non-cycling cows and heifers. To be used in combination with Gonadotrophin releasing hormone (GnRH) or analogue and PGF2α or analogue.

- In non-cycling cattle. To be used in combination with PGF2α or analogue and equine chorionic gonadotrophin (eCG).