sexed semen??

[shufly]

Does anyone know if sexed heifer semen is available on all or any of these bulls and if so where can I get it?

Jaycee's Ramblin Fever
TWCC Trendsetter T71
Paddy O'Malley
Who Made Who or Who Made Who 2
SS EBONYS GRANDMASTER
Judgement Day
SC Mo Magic S47

 

[hangonsloopy]

I know that they are fresh out of Grandmaster sexed right now.

 

[jbzdad]

I would like to hear from some people who have used sexed semen on flushes and the success rate..I think it may be verrrry bull dependant and operator dependent... Cowboy... are some bulls better than others? any ratios or stats available anywhere?

 

[Bulldaddy]

Trans Ova has had some success with invitro flushing using sexed semen.  I would be leary of traditional ET using sexed semen.

 

[SSIMMENTALS]

Found myself asking the same question on Mo Magic about six months ago and as of then, there wasn't any.

 

[hereford]

You can FLUSH with sexed semen all day long if you have the right concentration of straw. All the major bull studs only produce the concentration of 2.1 million that is only for AI. There are FLUSH concenration straws available from individual producers that have had their bull collected. Those straws are packed at the 5 million dose level. We usually use 4 straws of 5 million per flush. We usually see a slight decline of about 10% fertilized embryos as compared to using traditional semen in a FLUSH. Still, the sexed semen FLUSH more than pays for itself as all the calves are the gender we need even though there is a 10% slip in embryo production.

 

[firesweepranch]

Contact Robbie at Shoal Creek (owners of Mo Magic) and he can get you some sexed semen. Here is the url http://www.shoalcreeksimmental.com/herdbull.html

I just completed a class about using sexed semen with flushes, and hereford is correct; even though you have a slight drop in the amount of eggs harvested on a flush using sexed semen, you are ahead. Say you normally get 10 eggs in a flush, you can assume that 5 will be bulls and 5 will be heifers. Most breeders just want the heifers. When you use sexed semen, you would expect a 10% drop, or 9 eggs instead of 10. Those 9 eggs should be all heifers (90%). So would you rather have 9 heifer eggs or 5 heifer eggs and 5 bull eggs, and not know which is which?

I bought some Built Right eggs (full Simm), and when I had the cow preg checked she was confirmed with a bull calf (she is due tomorrow!). We were real disappointed because my daughter wanted a show heifer from this genetic match. Now, we have two more eggs to try, but that is another year of waiting. I would have been willing to pay a little more to get a sexed embryo!

 

[Mueller Show Cattle]

Shufly, both Paddy O'Malley and who made who are Lautner bulls and they are advertising that they are sexing semen on there bulls. So I think if you contact the on there Lautner farms website, you could get sexed semen from them for those bulls.

 

[hereford]

Hey firesweepranch, how do we get info on that class for flushing with sexed semen?  I'd like to check it out!

thanks

 

[firesweepranch]

Hey firesweepranch, how do we get info on that class for flushing with sexed semen?  I'd like to check it out!

thanks

It was included in an AI class my daughter took with ABS, and a close friend took the AI class with SGI  in Kansas and she got even more info than we did. It was part of the classroom setting, with more than an hour spent on it.
On a side note, my daughter (14) bred her first cow tonight! She said everything felt right We will see in three weeks  <party>

 

[Cowboy]

Folks, I have never been impressed with the sexed semen I have used personally here, but I am extremely fussy any way as most will tell you.

I have not done a large number of flushes using sexed semen at this point, but the ones I have done have been far less than stellar. The secret to using sexed semen (It comes in 1/4 ml sraws by the way) is two fold -- First, you need to thaw is slightly different - mainly not as long as 1/2 ml semen, but Secondly, it will be very -- VERY -- advantagous to DEEP HORN breed them. This will allow the semen to avoid the SEA of mucus in front of the cervix, and also allow it to get to the ovaducts with less stress due to travel time.

The flushes we have done here have been no more than 1/2 as good as conventional semen. Keep in mind -- I am a nut case when it comes to breeding these donors -- they get bred ONCE -- but that is on time -- not when it is convenient for me. The only way a donor needs bred different than a normal cow is due to her having multiple ovulations. I use one unit per horn (2 total), and breed one time - period. I can't remember the last cow I bred BEFORE midnight.

Sexed semen is slow moving, and will have a much lower survival rate in the straw compared to conventional semen. I have not been impressed with the number of post thaw live cells -- usually less than 40% compared ot the normal 70 plus. Add to that the small number to start with, and the odds go to the cow instead of us! It does no good to collect unfertile eggs whether it was the timing or the semen or whatever -- they are all worth -0-.

My advice is simple -- proceed with caution, and use it ONLY if you can  afford a complete -0-, it does happen!

I guess the bottom line is that you may be able to to tell I am not impressed!  Not so far any way!

Best of luck guys -- Terry

 

[Jenny]

so just from what you are saying, Terry, got another question for you.....
when you breed with just normal semen, is there a difference between the X and the Y sperm in their motility, their speed of movement, their longevity? 
I have been told the "female" sperm move slower but live longer, so if you breed a bit early, you have better chances of getting heifers and vice versa.

Also, do you see a difference between bull and heifer embryos in their vigor, their grade?
A guy from TransOva told me once that the bull embryos would be your largest and highest grading embryos, as a general rule, and that your heifer embryos would be a bit lower grading but have more vigor/chance of survival at that grade.

any truth to any of this??
thanks a bunch!

 

[frostback]

Contact Robbie at Shoal Creek (owners of Mo Magic) and he can get you some sexed semen. Here is the url http://www.shoalcreeksimmental.com/herdbull.html

I just completed a class about using sexed semen with flushes, and hereford is correct; even though you have a slight drop in the amount of eggs harvested on a flush using sexed semen, you are ahead. Say you normally get 10 eggs in a flush, you can assume that 5 will be bulls and 5 will be heifers. Most breeders just want the heifers. When you use sexed semen, you would expect a 10% drop, or 9 eggs instead of 10. Those 9 eggs should be all heifers (90%). So would you rather have 9 heifer eggs or 5 heifer eggs and 5 bull eggs, and not know which is which?

I bought some Built Right eggs (full Simm), and when I had the cow preg checked she was confirmed with a bull calf (she is due tomorrow!). We were real disappointed because my daughter wanted a show heifer from this genetic match. Now, we have two more eggs to try, but that is another year of waiting. I would have been willing to pay a little more to get a sexed embryo!

There is just a little bit wrong with the math using sexed semen. If you work on your 10 number. Say your donor ovulates 10 eggs. Using sexed semen not all of them would get fertilized. So already you are losing embryos. Also even if you get a large number fertilized not all will stick. You need to figure on only getting 60 or 70% conception.
Conventional flush. 10 eggs released
                                10 fertilized
                                        5 bulls
                                        5 heifers
                              all implanted    6 calves and get 3 heifers
Sexed semen flush 10 eggs released
                                4 fertilized
                                      1 bull
                                      3 heifer
                              all implanted    2 calves and get 1 heifer( if your lucky 2)
I think the only place it would pay off is in Invitro.

 

[donorheaven]

Contact Robbie at Shoal Creek (owners of Mo Magic) and he can get you some sexed semen. Here is the url http://www.shoalcreeksimmental.com/herdbull.html

I just completed a class about using sexed semen with flushes, and hereford is correct; even though you have a slight drop in the amount of eggs harvested on a flush using sexed semen, you are ahead. Say you normally get 10 eggs in a flush, you can assume that 5 will be bulls and 5 will be heifers. Most breeders just want the heifers. When you use sexed semen, you would expect a 10% drop, or 9 eggs instead of 10. Those 9 eggs should be all heifers (90%). So would you rather have 9 heifer eggs or 5 heifer eggs and 5 bull eggs, and not know which is which?

I bought some Built Right eggs (full Simm), and when I had the cow preg checked she was confirmed with a bull calf (she is due tomorrow!). We were real disappointed because my daughter wanted a show heifer from this genetic match. Now, we have two more eggs to try, but that is another year of waiting. I would have been willing to pay a little more to get a sexed embryo!

There is just a little bit wrong with the math using sexed semen. If you work on your 10 number. Say your donor ovulates 10 eggs. Using sexed semen not all of them would get fertilized. So already you are losing embryos. Also even if you get a large number fertilized not all will stick. You need to figure on only getting 60 or 70% conception.
Conventional flush. 10 eggs released
                                10 fertilized
                                        5 bulls
                                        5 heifers
                               all implanted    6 calves and get 3 heifers
Sexed semen flush 10 eggs released
                                 4 fertilized
                                       1 bull
                                       3 heifer
                               all implanted    2 calves and get 1 heifer( if your lucky 2)
I think the only place it would pay off is in Invitro.

correct but there is more:

the part that is not figured here is the cost of the semen with the number of units that will be required to get even one embryo fertilized in conventional.  if conventional semen has 30 million cells per straw and the sexed has 5 million lets say with much less motility and the conventional semen is $30 per straw and then the sexed is $400 and you  need 5 straws sexed to just match one straw conventional ( and most use 2-6 straws of conventional semen) to get near the number of eggs fertilized of sexed plus the cow can fail even if the semen does not fail..... it becomes very evident that you will have to do ivf to get any benefit from sexed semen when cost is considered.  in ivf the cost to do a unsexed procedure is going to be about $600 and to have conventional sexed procedure is $1600...then $400 semen makes sense as you only need one straw....thus, do ivf unsexed and then used sexed semen it will cost about $1000 and you will only use the semen if you get eggs off of ovary ready to fertilize and leave the semen in the tank till then...

 

[hereford]

When Sexing Technologies, the big bull studs, or even Trans Ova produces sexed semen, the post-thaw motility standards are supposed to be the same as conventional semen. 50% motility at immediate post-thaw and 30% at three hours. Some bulls are higher than others, but thats the same old story for all bulls with any semen.

When you look at a straw of conventional semen post-thaw, you've still got to account for all the primaries and secondaries. There is plenty of data to show that those cells never make it to the egg. During the sorting process, most cells with primaries and secondaries are not included in to a straw of sexed semen. The computer selects each individual cell before it is packed in to the straw, so the quality of a sexed straw is actually higher than a conventional straw. Its just that in a straw of conventional, there are more total cells, whether good or not. Thats why some bulls sort better than others. Some bulls are genetically predisposed to producing more morphology problems. YES...when you perform a flush with sexed semen, use the 5.0 million dose concentration not the 2.1 million concentration!!!

When you compare IVF to flushing, there are some major differences. When the recipe is right with IVF; i.e. the right bull and cow, the results are awesome. Some bulls work well to AI with, but don't work well in an IVF situation and vice versa. Thats just a mystery of mother nature that we can't explain. Thats why its a good idea to have a couple of bulls to work with when you're performing IVF.

Where IVF gets really good is over time. Over multiple IVF sessions, you can make so many more embryos than you can through a flush. Plus, you don't have the super ovulation drugs involved and  you can aspirate females as young as 9 months of age. When you add sexed semen to the equation, you can really spice things up. There also seems to be big differences in pricing for IVF from center to center. I 've noticed that some centers still charge up front costs no matter if embryos are produced or not. Our guy only charges on a per embryo produced basis. So when we bring in a donor, if she doesn't produce any embryos, then there's no charge. Its a pretty fair pricing system, because he has to produce good results to get paid.