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Cattle Boards
Breeding / Calving Issues
Inducing Labor w/Embryo Calves
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<blockquote data-quote="branguscowgirl" data-source="post: 1182336" data-attributes="member: 19938"><p>Slick we just flushed one of my cows. My understanding, (from the Embryologists explanation) is the semen is deposited just past the end of the cervix. He only uses one straw per breeding, but breeds them every 12 hrs. while they are in heat. We ended up breeding my cow 4 times.</p><p></p><p>With super ovulation the eggs may not mature all at the same time. The number of maturing eggs that the cow produces and are fertilized, is what determines the number of embryos you will get. (Not how many straws of semen that you use all at once.) There is a fine line with the dose of FSH given for 4 days prior. Too much, and you will have lots of eggs that are not of good quality. Too little FSH, and you will not produce enough eggs.</p><p>Embryos are "graded" under a microscope by an Embryologist prior to freezing. Be sure that you get grade 1 embryos if you are paying top dollar for them. My Embryologist will implant down to grade 3 embryos, but will put in 2 of them.</p><p></p><p>The first time my cow was flushed, (by a different vet) she was given too high of a dose of FSH and produced something like 40 eggs. Resulting in poor quality embryos and no keepers, (Brangus are very sensitive.) This time we greatly reduced her dose and only got 2 embryos, but they are of excellent quality.</p><p></p><p>As for "inducing labor". I have never heard of anyone doing that. I plan on matching the recip to the expected calf, to hopefully avoid calving issues. I also flushed using a LBW bull so that I was not limited as much when choosing recips.</p></blockquote><p></p>
[QUOTE="branguscowgirl, post: 1182336, member: 19938"] Slick we just flushed one of my cows. My understanding, (from the Embryologists explanation) is the semen is deposited just past the end of the cervix. He only uses one straw per breeding, but breeds them every 12 hrs. while they are in heat. We ended up breeding my cow 4 times. With super ovulation the eggs may not mature all at the same time. The number of maturing eggs that the cow produces and are fertilized, is what determines the number of embryos you will get. (Not how many straws of semen that you use all at once.) There is a fine line with the dose of FSH given for 4 days prior. Too much, and you will have lots of eggs that are not of good quality. Too little FSH, and you will not produce enough eggs. Embryos are "graded" under a microscope by an Embryologist prior to freezing. Be sure that you get grade 1 embryos if you are paying top dollar for them. My Embryologist will implant down to grade 3 embryos, but will put in 2 of them. The first time my cow was flushed, (by a different vet) she was given too high of a dose of FSH and produced something like 40 eggs. Resulting in poor quality embryos and no keepers, (Brangus are very sensitive.) This time we greatly reduced her dose and only got 2 embryos, but they are of excellent quality. As for "inducing labor". I have never heard of anyone doing that. I plan on matching the recip to the expected calf, to hopefully avoid calving issues. I also flushed using a LBW bull so that I was not limited as much when choosing recips. [/QUOTE]
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