What is the OvSynch protocol?
Current knowledge about the function of the reproductive tract and appropriate use of hormonal drugs affords control of the oestrus cycle of cows. One of the hormonal protocols is OvSynch, which enables artificial insemination (AI) to be performed at the precise optimum time without control of the ovaries and uterus.
What is a CIDR used for in cattle?
For cow/calf producers, EAZI-BREED ™ CIDR ® Cattle Insert helps to improve the effectiveness of reproduction programs through estrous synchronization, so groups of beef cows or heifers come into heat and can be bred within a shorter time period than natural estrous.
How soon after calving can you put a CIDR in a cow?
20 days
CIDR s are a common estrus synchronization tool, but they can also be used to bring cows into heat before they would normally come into heat on their own. For this to work, the CIDR should not be inserted until at least 20 days after calving. The uterus must shrink back to its original size for reproduction to occur.
What hormones are used in ovsynch?
Wiltbank and research associate Richard Pursley developed Ovsynch using two hormones already approved for dairy cattle: gonadotropin-releasing hormone (Cystorelin or Factrel) and prostaglandin (Lutalyse or Estrumate).
What is select synch?
The Select Synch treatment is capable of synchronizing estrus among the majority of cows in a herd with a low cost. There could be applied to the same group of cows with CIDR®s selectively placed in young thin or late calving cows (Twagiramungu et al 1995, Tenhagen et al 2005).
What CIDR contains?
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.
How do you synchronize cattle?
Progesterone can be given in the natural (progesterone) or synthetic (progestin) form. Both can be used to synchronize estrous in cattle. When the female ovulates, the site of ovulation develops a structure known as a corpus hemorrhagicum, which quickly (within four to seven days) develops into a corpus luteum (CL).
What is the co-synch + CIDR protocol?
This protocol is similar to the 7-day CO-Synch + CIDR protocol used in heifers; however, time from CIDR removal and PG injection to AI is increased. On d 0, cows are given an injection of GnRH and a CIDR insert is placed. The CIDR is removed on d 7 and an injection of PG is administered to lyse the CL.
What is the 7 Day co synch + CIDR protocol for cows?
Protocols for Cows 7-day CO-Synch + CIDR This protocol is similar to the 7-day CO-Synch + CIDR protocol used in heifers; however, time from CIDR removal and PG injection to AI is increased. On d 0, cows are given an injection of GnRH and a CIDR insert is placed.
Can OVsynch plus CIDR improve the pregnancy rate in repeat breeder cows?
The pregnancy rate in Ovsynch protocol and Ovsynch plus CIDR protocol was 54.54 per cent and 72.72 per cent respectively where as it was 27.27 per cent in control group. Thus, the Ovsynch plus CIDR programme can be effectively used to improve the pregnancy rate in repeat breeder cows.
What is the OVsynch protocol?
The OvSynch protocol began six days after detecting heat signs, i.e. when follicles were able to respond to GnRH injection. In this group of cows the ovulation rate and pregnancy rate on the 60thday after AI were 82.5% and 28.9% respectively.