Most clubby ai calfs i get are heifers

Does anyone else out there have this problem? I am starting to think they are sexing all the semen sending the heifer semen to the small buyers and throwing a bull in now and then to keep us trying and saving the bull sexed semen for the bigger semen buyers.

I think you are being sarcastic, but just in case:  It would not work this way.  You cannot separate the male semen from the female semen in the same ejaculate and package them both for sexed semen.  You must either sort for female or male.  Then whatever is sorted into the "trash" bin is discarded.  This fact is a large reason why sexed semen is so expensive, you throw away more than 50% of the total ejaculate volume. 

I had the oposite problem until this year,all a.i. calves were bulls,but this year got 2 heifers so far.

are you sure they even have male sex semen? they x gets left behind in the process from what i heard and all they can make is female sexed semen

Do any  of you folks use a cleanup bull and how does that compare .....

This makes me giggle; we want heifers but all we got this year is BULLS! We are in the heifer business, but all of our calves have been bulls except this last one we just had Friday, and we AI EVERYTHING (no bull here  ;D). Looks like we will be buying show heifers for our girls next year, since we could not produce any!!!

Got some really great simm bulls that will be for sale next year  <party>

You can sex for bulls, the process is called reverse sorting.  I dont think anyone is freezing sexed semen for bulls. The only time I have seen it done is for IVFs.

Select sires offers sexed semen for both sexes.  If they ever get semen sexing down to an art I think we will see people a.i. their top 50% of their cows for replacement females and a.i. the bottom end with sexed bull semen from a top-end terminal oriented sire.  I have pondered this concept and think it would make great sense.

It does and i have orders for next year along those lines.  Think of it like this, you lose around 10% conception so take you 80% conception on 100 heifers and drop it to 70%, multiply that by 90% heifer crop and you have 100 heifers with 63 AI heifer calves,  compare that to 100 heifers with 40%  AI heifer calves, which one do you think gives you more options and allows you to cull slightly harder in the beginning for choosing which females to AI.  Figure 18 for conventional semen and 35 for most sexed semen, you get more heifers for not much more per head.  In my book it makes sense, especially if you don't keep heifers and buy replacements.  Heifers are easily 10 a hunderweight cheaper around me at times, so that extra cost is made back darn fast.

firesweepranch said:

This makes me giggle; we want heifers but all we got this year is BULLS!  <party>

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haha same problem but with lambs 200% lamb crop 100% rams

Top Sires is advertising male sexed semen on Ocho Cinco.

Genex has been selling both male and female heifer sexed semen for a few years now.

I remember someone on here talking about the timing of AI has an impact on sex, AI to early there is a higher chance of one more than the other. It might have been if you AI later I'm not sure.

I noticed our calves that went over by 5+ days were all bulls. we split it with bulls and heifers this year

Lautner has HW sexed semen for steers....

aandtcattle said:

Select sires offers sexed semen for both sexes.  If they ever get semen sexing down to an art I think we will see people a.i. their top 50% of their cows for replacement females and a.i. the bottom end with sexed bull semen from a top-end terminal oriented sire.  I have pondered this concept and think it would make great sense.

Click to expand...

aandtcattle, explain to me how this would be a good strategy for the producers actually selling a large number of bulls on an annual basis? When marketing your bull crop, would it not make sense for them to come from your better females as well? I know that I certaily wouldn't want to buy a bull out of the bottom 50% of someone's herd. I would want a bull that is out of a good maternal line, of well put together, nice uddered females for me to in turn keep good replacement females out of. Someone like a Schaff Angus Valley for example...why would they put male sexed semen in only their bottom 50% of females, when you look at the bulls thay have produced effects on the angus industry? (and judging by the gross of their Bull Sale this year and other years, I would think they pick up a pretty sweet penny from their bull crop) Just my opinion, don't mean to offend you.

You can sort for both genders at any time. They make what they call a Primary gender and a Secondary gender. The Primary is not always the female. It depends upon the breed.

"Reverse Sorting" is when you take a Conventional straw of semen and thaw it out, then sort it in to Male and Female. The desired gender, or both genders, are then taken and used in an IVF capacity.

I would think aandt was saying that the bull calves would be steered if I assmued right and the strong maternal line swould continue in the heifer calfs.  Otherwise it just wouldnt work

it depends on if the AI'er is left handed or right handed.




yes...I'm only kidding.    If not using sexed semen, it's luck of the "straw"....(draw)

Yes, rarebirdz is correct.  I was talking about commercial applications when I mentioned using sexed bull semen being used on the bottom 50% of the cowherd.  I should have explained myself better.  In registered operations I would not recommend this protocol.