The Branch Ranch_10-6-17Genetix Sale_6-20-17State Fair TX_banner_9-22-17Silveus_banner_3-31-17
Advertise With Us Subscribe Today Facebook
SouthernLivestock.com
Not a member? Membership has its privileges— Register today! • Make SLS your homepage!
Cattle & Services Directory
Central TX ICA_9-20-17State Fair TX_box_9-22-17CFC_box ad_4-20-17
Lone Star Angus_10-14-17Silveus_8-11-16
Note: login or register to personalize
Submit Recipes to the Editor
home articles Reproduction |

Moving late calving cows up in the breeding season

published: April 21st 2017
by: Bethany Johnston and Jay Jenkins
source: Nebraska Extension Beef Educators
As the end of the calving season nears for many cattlemen, the last few cows in the heavy pen seem to last forever. Those late calvers are doing more than dragging out the calving season. They are costing you money. Their young calves are usually lighter at weaning, and late calving cows usually rebreed later or not at all. 
How can you move up a late calving cow in the breeding season? The answer is a CIDR. CIDR stands for Controlled Intravaginal Drug Release device. It is inserted into the cow’s vagina, where it releases the hormone progesterone. CIDRs are a common estrus synchronization tool, but they can also be used to bring cows into heat before she would normally come into heat on her own.
In order for this to work, you should insert the CIDR no sooner than 20 days after calving. The uterus must shrink back to its original size for reproduction to occur. Recovery takes time-imagine something holding a 90-pound calf needing to shrink to the size of volleyball. Trying to “jump start” the cycle with a CIDR (progesterone device) too early after calving could result in less than desired pregnancy results.
If you plan to use natural service breeding, insert a CIDR for 7 days, then remove the CIDR on day 7 and give an injection of prostaglandin. Bulls can be immediately placed with the cows. There is no need for extra bulls, a bull to cow ratio of 1:25 should be sufficient. However, all bulls should have a breeding soundness exam by a veterinarian. Young bulls may require special attention and a higher bull to cow ratio.
This protocol requires two cattle handlings and will cost around $15 for the CIDR and prostaglandin.
Since the CIDR will synchronize estrus you could also use artificial insemination (A.I.). If you choose to A.I. you need to add a GnRH injection at the CIDR insertion, leave the CIDR in for 7 days, and inject prostaglandin when you remove the CIDR.
If you plan to A.I. it would be worth your time to look over the different estrus synchronization protocols at: http://beefrepro .info or visit with your A.I. representative or Exten-sion Educator. Choose a system that works best for you. Any of the 7-day CIDR protocols will “jump start” the estrus cycle. The “recipe” for each system should be followed exactly- no guessing or giving late injections! 
Cows should be in good condition, a body condition score of 5 or greater at the time of calving, and maintaining or gaining weight after calving through breeding. Cows maintaining or gaining weight are more likely to conceive and sustain a pregnancy than cows losing weight.
It will cost a little money and take some extra work, but it is possible to move those late calving cows up. 
***

Site:   Home   Publications   Market Reports   Sale Reports   Sale Calendar   Cattle & Service Directory   Full Commodities Report   Services   About Us   Contact Us

Article Categories:   All   Industry News   Herd Health   Feed & Nutrition   Pastures & Forages   Reproduction   Marketing   Columnists   Production   Genetics & Performance   Weather Forecast   Breed News   Producer Feature Stories   Items of Interest   New Products   Recipes

User:   Login   Logout   Register/Profile   Submit Market Report   Submit Sale Report