Screening of some variables influencing the results of embryo transfer in the ewe. I. Five-day-old embryos
Rasa Aragonesa ewes (n = 89) received 2 embryos on Day 6 of the estrous cycle (Day 0 = estrus) from 46 donors of the same breed that had been superovulated with FSH-p. The influence of several variables on fertility and prolificacy after transfer was studied by discriminant analysis. Our results showed that the main variables that contributed to a high fertility rate were the degree of synchrony (better outcome if donors come into estrus later than the recipients); Fluorogestone acetate (FGA) to estrus interval and interval from previous lambing in the recipients, ovulation rate of the donors and recipients (better if superior to the mean); prolificacy of recipients in the previous lambing; and difference in developmental stage of the pair of transferred embryos (better if inferior to the mean). The main variables affecting prolificacy were the ovulation rate and weight of the donors and progesterone concentrations of the recipients (better if lower than the mean); age of the donors and difference in progesterone concentrations between donors minus those of the recipients (better if higher than the mean). The percentage of ewes correctly classified into lambing or not lambing status was 73% (P < 0.001) and that of the ewes correctly classified as lambing 1 or 2 lambs was 81.8% (P < 0.001). Whether or not the criteria we have established for optimum transfer results are applicable to conditions other than our own still needs to be confirmed. © 1995.
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Format: | journal article biblioteca |
Language: | English |
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Elsevier
1995
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Subjects: | Embryo transfer, Discriminant, Analysis, Ewe, |
Online Access: | http://hdl.handle.net/20.500.12792/3629 http://hdl.handle.net/10261/294404 |
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dig-inia-es-10261-2944042023-02-20T10:38:24Z Screening of some variables influencing the results of embryo transfer in the ewe. I. Five-day-old embryos Alabart, J. L. Folch, J. Fernández-Arias, A. Ramón, J. P. Garbayo, A. Cocero Oviedo, María Jesús Embryo transfer Discriminant Analysis Ewe Rasa Aragonesa ewes (n = 89) received 2 embryos on Day 6 of the estrous cycle (Day 0 = estrus) from 46 donors of the same breed that had been superovulated with FSH-p. The influence of several variables on fertility and prolificacy after transfer was studied by discriminant analysis. Our results showed that the main variables that contributed to a high fertility rate were the degree of synchrony (better outcome if donors come into estrus later than the recipients); Fluorogestone acetate (FGA) to estrus interval and interval from previous lambing in the recipients, ovulation rate of the donors and recipients (better if superior to the mean); prolificacy of recipients in the previous lambing; and difference in developmental stage of the pair of transferred embryos (better if inferior to the mean). The main variables affecting prolificacy were the ovulation rate and weight of the donors and progesterone concentrations of the recipients (better if lower than the mean); age of the donors and difference in progesterone concentrations between donors minus those of the recipients (better if higher than the mean). The percentage of ewes correctly classified into lambing or not lambing status was 73% (P < 0.001) and that of the ewes correctly classified as lambing 1 or 2 lambs was 81.8% (P < 0.001). Whether or not the criteria we have established for optimum transfer results are applicable to conditions other than our own still needs to be confirmed. © 1995. 2023-02-20T10:38:24Z 2023-02-20T10:38:24Z 1995 journal article Theriogenology 44(7): 1011-1026 (1995) 0093-691X http://hdl.handle.net/20.500.12792/3629 http://hdl.handle.net/10261/294404 10.1016/0093-691X(95)00288-J 1879-3231 en none Elsevier |
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Embryo transfer Discriminant Analysis Ewe Embryo transfer Discriminant Analysis Ewe |
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Embryo transfer Discriminant Analysis Ewe Embryo transfer Discriminant Analysis Ewe Alabart, J. L. Folch, J. Fernández-Arias, A. Ramón, J. P. Garbayo, A. Cocero Oviedo, María Jesús Screening of some variables influencing the results of embryo transfer in the ewe. I. Five-day-old embryos |
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Rasa Aragonesa ewes (n = 89) received 2 embryos on Day 6 of the estrous cycle (Day 0 = estrus) from 46 donors of the same breed that had been superovulated with FSH-p. The influence of several variables on fertility and prolificacy after transfer was studied by discriminant analysis. Our results showed that the main variables that contributed to a high fertility rate were the degree of synchrony (better outcome if donors come into estrus later than the recipients); Fluorogestone acetate (FGA) to estrus interval and interval from previous lambing in the recipients, ovulation rate of the donors and recipients (better if superior to the mean); prolificacy of recipients in the previous lambing; and difference in developmental stage of the pair of transferred embryos (better if inferior to the mean). The main variables affecting prolificacy were the ovulation rate and weight of the donors and progesterone concentrations of the recipients (better if lower than the mean); age of the donors and difference in progesterone concentrations between donors minus those of the recipients (better if higher than the mean). The percentage of ewes correctly classified into lambing or not lambing status was 73% (P < 0.001) and that of the ewes correctly classified as lambing 1 or 2 lambs was 81.8% (P < 0.001). Whether or not the criteria we have established for optimum transfer results are applicable to conditions other than our own still needs to be confirmed. © 1995. |
format |
journal article |
topic_facet |
Embryo transfer Discriminant Analysis Ewe |
author |
Alabart, J. L. Folch, J. Fernández-Arias, A. Ramón, J. P. Garbayo, A. Cocero Oviedo, María Jesús |
author_facet |
Alabart, J. L. Folch, J. Fernández-Arias, A. Ramón, J. P. Garbayo, A. Cocero Oviedo, María Jesús |
author_sort |
Alabart, J. L. |
title |
Screening of some variables influencing the results of embryo transfer in the ewe. I. Five-day-old embryos |
title_short |
Screening of some variables influencing the results of embryo transfer in the ewe. I. Five-day-old embryos |
title_full |
Screening of some variables influencing the results of embryo transfer in the ewe. I. Five-day-old embryos |
title_fullStr |
Screening of some variables influencing the results of embryo transfer in the ewe. I. Five-day-old embryos |
title_full_unstemmed |
Screening of some variables influencing the results of embryo transfer in the ewe. I. Five-day-old embryos |
title_sort |
screening of some variables influencing the results of embryo transfer in the ewe. i. five-day-old embryos |
publisher |
Elsevier |
publishDate |
1995 |
url |
http://hdl.handle.net/20.500.12792/3629 http://hdl.handle.net/10261/294404 |
work_keys_str_mv |
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