another cdir ?

does it make a difference what stage of their cycle they are in when you put them in as to their effectiveness?  i guess what im asking is there a better time than not to start them synching? 

linnettejane said:

does it make a difference what stage of their cycle they are in when you put them in as to their effectiveness?  i guess what im asking is there a better time than not to start them synching? 

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We always wait at least 7 days after their last heat before putting in cdirs.

It doesn't matter when you put them in as long as you leave them in for 7-10 days to let a CL form. A CL will form 7 days after ovulation so if they come in right before you put in the cidr, it woint matter. Also, they wont come into heat with a cidr in place due to the high progesterone level; this will maintain the CL until you pull it. hope this helps

That's not necessarily true.  When we take the cidr out we give an injection of lute.  The chances of lute working at 7 days is highly diminished.  I would think twice before putting in a cidr at day 0. 

  What Cattledog is saying is on target. That being said, if you are going to syn the herd, you need to decide to close your eyes and work what works best for your schedule. You could breed for a week and then think that you are going to put in the cidrs, but then what about the cow that was going to come in on day 8 or 9? It would be endless. The only way that you could possibly avoid the scenario would be to heat detect for 3 weeks first and then would have an idea of which cows to breed the first seven days and put your cidrs in the rest. Kinda defeating your purpose of syning I would think. My opinion would be to work the season around your schedule and go for it.
  We have cidred our cows the last 3 years and are thinking of going back to natural heats with the help of a penal blocked gomer bull. We think that all of the expense of the cidr protocol maybe offset by the extra cost of feed and time involved in breeding off natural heat cycles.  We'll see how it shakes out. Good Luck, Brent

Yep, If you have a large group of cows you aren't going to have everyone of them in heat when you go to breed them.  My numbers are smaller and I always keep track of the heats when I see the cows come in before they are ready to breed.  The reason I use the Cidr is I have a full time job besides cattle.  I can manipulate my breeding time to fall on the weekends.  We used to have a gomer bull and that made my life so easy!  We had to get rid of him a couple years ago.  He just got grouchier and meaner every year.  He was also tearing something up every time I turned around.

  Quote, He just got grouchier and meaner every year.  He was also tearing something up every time I turned around.


Gomer bull,( Sexual frustration)!!!  Rated, PG.

So if you have a cow that is in heat today and you are putting in cidrs tomorrow to synch her for a recip, would this work?   

well...its as clear as mud now... :-\
here's my problem...i had to schedule my breeding time last year because my ai guy books up and he will only synch one farm at a time, which i dont blame him for doing at all...scheduling that far in advance though, i had no idea where my cows would be in their natural cycle...it was more of an "im off for spring break this week, need to breed then" situation...i was just wondering if i was shooting myself in the foot by not considering where they were in their cycle when starting this process, or if it even mattered....ive got more invested dollar wise this year with buying sexed semen and just dont want to be shooting it on the ground so to speak...and i want maximum results!