Thought you were referring to litter size, not sexes. =) Not sure about the result of sexes.

Wild West Bulldogs

Has nothing to do with stud, it all depends on how many eggs the bitch releases and how many mature to be fertilized. Sperm count needs to be at least 80% regardless of fresh/chilled/frozen.

Wild West Bulldogs

That is not correct.

The eggs and sperm are both haploid cells (containing 1 copy of each chromosome from the parent).

Since all genetic females have 2 "X" chromosomes, the haploid eggs can only contain an "X" chromosome.

Males result from an "XY" chromosome combination. That means each haploid sperm cell can carry either an "X" (female) or a "Y" (male) chromosome.

If an egg is fertilized by a sperm cell carrying a "Y" chromosome the resulting offspring will be genetically male. On the other hand, if the egg is fertilized by a sperm cell carrying an "X" chromosome the resulting offspring will be genetically female.

I can't really speak to the type of semen being used having any influence on the predominant sex of the resulting litter.

I know that in cattle, sexed semen has been developed using the difference in the swimming speed of "Y" chromosome containing sperm versus those that carry an "X" chromosome, however I have not seen corresponding work in dogs. The last information I read on the cattle side showed about an 80% success rate in gender selection through sexed semen.

timing must have been perfect! lol
someone told me the sex was determined by the bitches eggs... they are either male eggs or female eggs.. i had never heard that before and wondered if anyone else had......


Chris.....

OK, so see if this makes sense. I have thought the same thing but this is the reason why I agree with you. Closer to ovulation the eggs are not ready to be fertilzed quite yet, so if you inseminate at this point the faster male sperm which doesn't live as long, decreases in numbers by the time the egg is ready to be fertilized, thus giving the slower more viable female sperm more chance to fertilize the egg.

Now, apply this same thing to chilled sperm. The sperm is affected by the cooling and rewarming process as well as the length of time between being emitted and being placed in the female. I think that it is possible that the male sperm is more at risk due to it being less viable therefore giving the female sperm a better chance at fertilizing the egg.

breeding later you get the boys.

From my understanding, its like a human trying for a girl you have sex 2-3 days before ovulation. If your trying for a boy you have sex a few days after ovulation. It's not 100%.

Vicky,
Bosco, Bella, Breve' & Holly

www.LangagerBulldogs.com

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i had always been told exactly what you had written... i was like what? the eggs???? didnt make any sense to me but i thought i would throw it out there....

Chris.....

Thanks Dan.....

and I thought the same maybe true in other species. I think that I will start trying to keep this in mind with future breedings, while of course also keeping in mind how mature the eggs are too. It would be interesting if breeders would keep a record of this information.

n/m