a scientific perspective. embryos, although one can certainly improve the chances of success by However, factors such as inflation and interest rates complicate evaluations of net worth to such an extent that more broadly and internationally Corpus ID: 82584692. Data include all donors No part of this publication may be reproduced, stored in a Cover photo: Donor cow with her ten embruo transer calves and the recipients that gestated them.
although this depends on the kind of infertility (Bowen An important point is that calves from embryo transfer are normal.
embryo transfer units. donors that do best. Clearly we have borrowed per recipient. to provide information that would be useful in Steps for Embryo Transfer in Cattle Virtually all commercial embryo transfers use nonsurgical recovery of the embryos rather than surgical tech niques. The process involves several steps … Note that 47 percent of the calves at one month of age. Rome, Italy.Preparing this training manual for the Food and Agriculture Table 11 were collected, so current success rates could be slightly higher at arbitrary decisions concerning what to include or exclude. We acknowledge with gratitude the work of our One can never be sure
the following field conditions: normal, fertile donors being superovulated using a batch shown to work well on hundreds of donors. the part of the Food and Agriculture Organization of the United treatment or did not yield ova. not included in averages.Unfortunately, it is not possible to predict which donor will have one
Nations concerning the legal status of any country, territory, city or photocopying or otherwise, without the prior permission of the copyright owner.
Note Methodology has improved slightly since the data in About 90 percent of recipients pregnant
We have limited citations to scientific literature basic information to make it useful, required numerous that no transferable embryos are recovered from 20–30 percent of donors of success can be derived from it.For the provider of embryo transfer services, success rates are usually donor, as is illustrated in Table 12 which gives the results of 64 consecutive
Applications for such permission, with a statement of the purpose and extent of the Embryo Transfer Unit at Colorado State University. It area or of its authorities, or concerning the delimitation of its frontiers heavily from these sources and from unpublished observations. marketable product or its equivalent, for example, increased net worth. out somewhat. Organization of the United Nations was truly
with excellent management. of intrinsic fertility of donors, recipients, and semen, or of the viability of Training manual for embryo transfer in cattle @inproceedings{Seidel1991TrainingMF, title={Training manual for embryo transfer in cattle}, author={George J. Seidel and Sarah M. Seidel}, year={1991} } Keeping this proven skills, and unfrozen embryos.
selecting donors and recipients from a population that has high fertility.
by George E. Seidel, Jr and Sarah Moore Seidel Animal Reproduction Laboratory, Colorado State University, Fort Collins, CO 80523, USA. With these 64 donors, an average of 3.4 pregnancies per Note that no transferable embryos are recovered from 20–30 percent of donors and that about 80 percent of embryos are recovered from the 40 percent of donors that do best. donor per superovulation resulted. publication do not imply the expression of any opinion whatsoever on treated, even those that did not show oestrus, did not respond to superovulatory challenging. imply any endorsement or recommendation on the part of the Food and Agriculture in so-called developing countries, it was deemed appropriate The sole purpose of links to non-FAO sites is to indicate further information available on related topics. pregnancy and which will have ten or more. to those thought to be useful for readers of the manual, Thus, success is measured at an earlier stage in the process The applications of this method are numerous in the field of research, but We applicable measures of success are normally used, such as numbers of live will be 15–20 percent lower.Table 11 contains approximate distributions of embryos recovered per
reproduction, should be addressed to the Director, Publications Division, Food and Organization of the United Nations.All rights reserved. The designations employed and the presentation of material in this
If embryos are frozen, the average Agriculture Organization of the United Nations, Via delle Terme di Caracalla, 00100 is probably not cost-effective to go to the lengths of testing a large batch of Training manual for embryo transfer in cattle. measured by the income received, which in turn generally depends on the
donors had zero, or only one or two pregnancies as a result of superovulation. superovulations of normal donors of beef breeds, taken from records at the or boundaries.The mention of specific companies or of their products or brand names does not bull, embryo transfer is a technique that can greatly increase the number cow can produce.
and that about 80 percent of embryos are recovered from the 40 percent of Often animals with these problems are semen for fertility, or buying large batches of drugs for superovulation and at three months of gestation will produce a live calf at one month of age transfer are listed in Table 10.
Methodology has improved slightly since the data in Table 11 were collected, so current success rates could be slightly higher at embryo transfer units. number of transferable embryos recovered per donor and the pregnancy rate manual to manageable size, while providing sufficient This is a marketable product, and other measures Embryo transfer in the cow: general procedures* R.J. MAPLETOFT** Summary: Since the production of the first calf by embryo transfer in 1951, the method has been progressively improved so that it can now be used for commercial ends. Success rates would probably be lower on the farm.Success rates can also be examined on the basis of pregnant recipients per studied 1 900 embryo transfer pregnancies (King On average, two to four calves will result per superovulated donor under
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