embryo transfer review mrs. tarver. what is a major factor in embryo transfer success? successful...
TRANSCRIPT
![Page 1: Embryo Transfer Review Mrs. Tarver. What is a major factor in embryo transfer success? Successful control of estrus in donor and recipient females](https://reader036.vdocuments.us/reader036/viewer/2022082505/56649f0e5503460f94c22351/html5/thumbnails/1.jpg)
Embryo Transfer Review
Mrs. Tarver
![Page 2: Embryo Transfer Review Mrs. Tarver. What is a major factor in embryo transfer success? Successful control of estrus in donor and recipient females](https://reader036.vdocuments.us/reader036/viewer/2022082505/56649f0e5503460f94c22351/html5/thumbnails/2.jpg)
What is a major factor in embryo transfer success?
• Successful control of estrus in donor and recipient females
![Page 3: Embryo Transfer Review Mrs. Tarver. What is a major factor in embryo transfer success? Successful control of estrus in donor and recipient females](https://reader036.vdocuments.us/reader036/viewer/2022082505/56649f0e5503460f94c22351/html5/thumbnails/3.jpg)
Why is embryo transfer done surgically in pigs and sheep?
• It is difficult to pass an embryo collection device through the cervix of the ewe or sow.
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What is the transferred survival rate of an embryo?
• 55% to 70%
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What is an acceptable difference in estrus between donor and recipient?
• Only up to one day difference in estrus cycles is acceptable between donor and recipient females.
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What is the optimal placement for implantation?
• The embryo is expelled into the uterine horn that is on the same side as the ovulated ovary to optimize the embryo implantation rate.
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When and where was the first embryo transfer performed?
• Using rabbits, a researcher at the University of Cambridge in 1890 performed the first embryo transfer.
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What is superovulation?
• The release of many eggs (oocytes) during a single estrus period
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Embryos in early stages of development should be deposited where?
• Oviduct
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What is the most accurate predictor of embryo transfer success rate?
• The stage of embryonic development
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After superovulation when should the female be bred?
• 12-24 hours after she comes into heat
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What is in vitro fertilization?
• Laboratory technique for conception of an embryo outside the mother’s body
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What is a Foley catheter?
• A specially designed catheter used when collecting embryos using non-surgical methods.
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How do conception rates compare for surgically vs. non-surgically transferred
embryos?• Conception rates are up to 5% greater with
surgical transfer
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Why is synchronization of estrus important for embryo transfer?
• It is important to establish a uniform uterine environment for the embryo
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Discuss embryo evaluation and the grading scale.
• After collection, the embryos are evaluated for quality using a stereoscopic microscope. Shape, color, texture, and size are some factors considered during the evaluation. Embryos are graded on a scale from one (excellent) to four (poor).