Differences in development of bovine oocytes recovered by aspiration or by mincing
Article Abstract:
Recovery of bovine oocytes showed that the number of cumulus-oocyte complexes (COC) varied greatly among the 24 pairs of ovaries with a range of 7 to 71. The overall rate of in vitro development to the blastocyst stage was 18% from a range of 0 to 17. The presence of corpora lutea or large follicles did not influence the proportion of COCs that reached the blastocyst stage in vitro. Although the two methods of COC recovery did not differ, there was a positive correlation between COCs recovered by aspiration and subsequent development to blastocyst stage. This is significant for in vitro fertilization studies.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
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Co-culture of in vitro fertilized bovine embryos with different cell monolayers
Article Abstract:
The effects of different cell monolayers on the in vitro development of early bovine embryos was investigated. The rates of development were found to be generally similar between cell culture types, but those co-cultured with bovine oviductal cells developed faster and those co-cultured with mouse testicular cells developed at a slower rate. These observations seem to suggest that embryotrophic factors may not be oviduct- and species-specific under current culture methods.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
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Disappearance of acetic acid from the bovine reticulorumen at basal and elevated concentrations of acetic acid
Article Abstract:
In situ monitoring revealed that disappearance of acetic acid from the reticulorumen of beef steers is directly related to the rate of production up to the limit of and exceeding the physiologic range. About two-thirds of the acetic acid is absorbed, and the remainder passes onward in liquid form. The presence of absorption sites distal to the reticulorumen is therefore important in total acetic acid absorption.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
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