Farmer Z
Well-known member
I had 9 cows to calve this spring. Every one had a bull and that works perfectly fine for me. I was just wondering what others might have experienced in terms of straight runs like this.
bandit80":3qcmkjrd said:9 calves of one sex is rare. I would think on most operations anything over 60/40 is unusual. My herd can sway one way or the other, but by the end of calving season, it is usually about the same between bulls and heifers.
paulandashia":3vflndbk said:I also heard theories that the sex can depend on how FAR the Sperm have to Travel to get to the egg.
That if the bull "does his Deed" Very DEEPLY inside the Cow, chances are she is going to get pregnant with a Male Calf, and if the Bull does it Further away from the Egg, Chances are more towards a Female Calf.
It has something to do with the Sperm that Carry the "Y" Chromosome (Male) are a lot FASTER moving than their "X" (Female) carrying Counterparts, so if they have a short distance to travel, they reach the egg sooner, but if they have a LONG way to go to get to the egg, they use up so much energy by swimming fast, that they tire quickly, and becuse they are in front of the slower moving "X" Carrying Sperms, they are eliminated and killed off first by the cow's Immune System. The "X" (Female) Carrying Sperm are much slower moving, but they can travel a much longer distance and have better stamina... LOL
dun":uny49e02 said:paulandashia":uny49e02 said:I also heard theories that the sex can depend on how FAR the Sperm have to Travel to get to the egg.
That if the bull "does his Deed" Very DEEPLY inside the Cow, chances are she is going to get pregnant with a Male Calf, and if the Bull does it Further away from the Egg, Chances are more towards a Female Calf.
It has something to do with the Sperm that Carry the "Y" Chromosome (Male) are a lot FASTER moving than their "X" (Female) carrying Counterparts, so if they have a short distance to travel, they reach the egg sooner, but if they have a LONG way to go to get to the egg, they use up so much energy by swimming fast, that they tire quickly, and becuse they are in front of the slower moving "X" Carrying Sperms, they are eliminated and killed off first by the cow's Immune System. The "X" (Female) Carrying Sperm are much slower moving, but they can travel a much longer distance and have better stamina... LOL
Distance isn;t the isue since the distance from the cervix to the egg is the same and there is no way the bull can put it any closer then that. It has to do with the timing of the deposition of semen to the time of ovulation. earlier deposition tends toward more bulls, later to more heifers.
KNERSIE":24o7xc76 said:dun":24o7xc76 said:paulandashia":24o7xc76 said:I also heard theories that the sex can depend on how FAR the Sperm have to Travel to get to the egg.
That if the bull "does his Deed" Very DEEPLY inside the Cow, chances are she is going to get pregnant with a Male Calf, and if the Bull does it Further away from the Egg, Chances are more towards a Female Calf.
It has something to do with the Sperm that Carry the "Y" Chromosome (Male) are a lot FASTER moving than their "X" (Female) carrying Counterparts, so if they have a short distance to travel, they reach the egg sooner, but if they have a LONG way to go to get to the egg, they use up so much energy by swimming fast, that they tire quickly, and becuse they are in front of the slower moving "X" Carrying Sperms, they are eliminated and killed off first by the cow's Immune System. The "X" (Female) Carrying Sperm are much slower moving, but they can travel a much longer distance and have better stamina... LOL
Distance isn;t the isue since the distance from the cervix to the egg is the same and there is no way the bull can put it any closer then that. It has to do with the timing of the deposition of semen to the time of ovulation. earlier deposition tends toward more bulls, later to more heifers.
Whew! I almost had to add another selection criteria!
I wonder how long it will take before some academic wannabee develope a EPD for Pecker length?
jgibson":2y7v1ghr said:We have had 100% heifers this year. Last year we had 9 out of 10 bulls.
paulandashia":3i9qykvk said:It takes 2 sets of Chromosomes to form a living, breathing animal.
Either "XX" (Female) or "XY" (Male).
If 85% of the Sperm are carrying the "Y" Chromosome, and only 15% carry the "X" Chromosome, chances are, that 85% of HIS offspring are going to be Male, because the "X" from the Cow, and the "Y" from the Bull will make a Male Calf, and the "X" from the Cow and "X" from the Bull will produce FEMALE.