Progesterone concentrations are maintained at a relatively constant level during the next seven days. Upon removal, progesterone concentrations are quickly eliminated. But caution should be taken when handling them, he says. Always wear latex or nitrile gloves to prevent exposure to progesterone and introducing contaminants into the vaginas of treated females. In addition, never use CIDR inserts more than once, Lamb says, because it may increase incidence of vaginal infections.
What happens if you put a CIDR in a pregnant cow? Furthermore, progesterone will not be detectable 7 h after removal. How do you use cow CIDRs? Controlled internal drug release CIDR devices are used in livestock for the synchronization of estrus. They are T-shaped devices with a silicone-coated nylon core. The silicone coating is impregnated with progesterone.
CIDRs are inserted intra-vaginally using a specialized applicator. The standard treatment for cows with a corpus luteum CL is an injection of prostaglandin PG which will bring most cows into heat two to four days after injection.
Combining the PG with heat detection focussed on the treated cow will result in cows getting pregnant more quickly. Progesterone P4 from the corpus luteum is critical for the establishment and maintenance of pregnancy and plays a major role in regulating endometrial secretions essential for stimulating and mediating changes in conceptus growth and differentiation throughout early pregnancy in ruminants.
Packaging: CIDRs come in a plastic pouch. There are 10 inserts in each pouch. The plastic applicator is packaged separately 5. Human Warning : Avoid contact with skin by wearing latex gloves when handling the inserts.
Keep this and all medications out of the reach of children. Residue Warning: Neither a pre-slaughter withdrawal interval nor a milk discard time is required when this product is used according to label directions. Bartolome, J. Thieme, O. Safilho, P. Melendez, L. Archbald, and W. Colazo, M. General Veterinary. General Veterinary Pty. Leitman, N. Some disadvantages of CIDRs include the expense and labor required for trips through the chute.
In addition, in contrast to MGA, heifers must make 1 or 2 extra trips in addition to breeding through the chute for insertion and removal of the CIDR. However, by using CIDR protocols producers can be confident the correct dosage of progestin is delivered each day without starting the feeder wagon or worrying about delivering a consistent dose via MGA.
The key to success with any estrus synchronization protocol, including CIDRs, is compliance. There are different CIDR protocols for heifers and cows, and it is important to follow the correct protocol and timeline based on the age of the female you are dealing with. These time differences are based on differences in hormones and time of ovulation between heifers and cows, with protocols designed to breed at a time that will yield the most successful results.
Specifically within the heifer protocols, CIDRs can be used for 5, 6, 7 or 14 days. When utilizing the day CIDR it is important to remember to never breed females on the first estrus after CIDR removal due to persistent, aged follicles which are likely less fertile and would not return favorable results. Differences in puberty were seen between treatments due to more heifers in the day protocol being prepubertal at treatment initiation.
However, pregnancy rates between the 3 FTAI treatments were not different resulting in
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