Salicylic
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preston39":66u0ahtd said:============dun":66u0ahtd said:Chuckie":66u0ahtd said:I realize that the best way to A.I. a cow is to do it when the egg has dropped and the sperm is fresh, but I need an answer to this question .....When sperm is deposited into a cow, how long does it stay alive and mobile? If the egg from the cow comes (e.g.) 6-8 hours later after depositing the sperm, then is it possible for the sperm to still be able to fertilize the egg. Then if the egg drops into the uterus, how long is the egg going to stay there and accept the sperm? I have been asked this question, but I didn't know the answer.
Fertilization doesn;t take place in the uterus it takes place in the fallopian tubes. That's the reason semen should be depostited prior to ovulation. The sperm would have a tough time finding the egg in something as big as the uterus.
dun
dun,
Can't relate to the fallopian tube portion of your post. Please clarify. Bovines do not have fallopian tubes.
Thru/past the cervix there is a short uterine cavity then it splits into to uterine horns(right and left).
Pregnancy occurs in one or the other(single egg...pregnancy)of the uterine horns. Thus, the reason for depositing the sperm just past the cervix(1/2 to 1") into the uterine cavity during AI.
Then those little fellows make their way into each uterine horn and fertilize the egg that has been deposited in the right or left uterine horn during ovulation.
If semen is deposited to far into the uterine cavity it will be into one or the other uterine horns and may not ferterlize the ovulated egg...since the egg may have been deposited into the other uterine horn.
At the end of each uterine horn there is a small tube...forget what it is called....which connects the end of the each uterine horn to the ovary portion of the reproductive tract. If there should be a pregnancy in the small tube(possible?) it would be regarded as an ...eptopic...pregnancy....not good.
Preston, what subject do you teach at college? Where do you get your crazy ideas about the reproductive aspects of cattle, first we had cows don't bleed, now cows don't have fallopian tubes.
Fallopian Tube of the Cow
The fallopian tube, present in all higher vertebrates such as the cow, provides a pathway or connection between the ovary and the uterus. After an egg has been released from the ovary, the egg is drawn into the fallopian tube by the action of tiny hairlike structures called cilia, which then transport the egg to the uterus, where it is fertilized and implanted and begins to develop.