Title: Morphological normality of cattle embryos following superovulation using PMSG
Abstract: One hundred and ninety three beef heifers were superovulated using a PMSG-Oestradiol 17β-HCG regime beginning on day 16 of the oestrous cycle. Eggs were recovered 2–6 days post oestrus and classified morphologically. A mean of 8.3 fertilized eggs per donor was obtained, but 19% of these were considered non-viable. The percentage of abnormal embryos increased as ovarian stimulation increased and as the interval from estrus to recovery increased. Eggs classified as being degenerate showed no evidence of continued cleavage in the rabbit oviduct, although eggs with some forms of minor abnormality were capable of developing at the normal rate in the rabbit. We conclude that the uterine environment following high levels of superovulation can be hostile for egg development.
Publication Year: 1978
Publication Date: 1978-08-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 47
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